All United Airlines flight numbers

United Airlines’ own profile links its strongest and weakest departures only. This is the complete set: every United Airlines flight number with enough operating history to clear FlyerIntel’s publishing bar, still flying its current route, July 2023 – August 2026.

United Airlines has 350 flight numbers with enough history to judge, on 223 routes. The busiest is UA1170 (LAX → HNL) with 1,158 operations.

Among the 120 with at least 1,000 operations, UA2285 (SMF → DEN) arrives on time most often (94.1%) and UA2400 (BOS → SFO) least (61.2%).

Numbers leave from 43 airports. DEN has 79, IAH has 30, EWR has 26: 39% of the list between them.

The middle half of the 350 rated numbers arrive on time between 73.6% and 87.9% of the time, with a median of 82.6%.

Every published flight number

350 numbers, ordered by operations recorded on the route each one currently flies.

All United Airlines flight numbers
Rank	Flight	Route	Operations	On time
1	UA1170	LAX → HNL Los Angeles to Honolulu	1,158	81.3%
2	UA252	HNL → IAH Honolulu to Houston	1,158	86.7%
3	UA383	HNL → DEN Honolulu to Denver	1,158	88.2%
4	UA1013	DEN → LAX Denver to Los Angeles	1,158	84.9%
5	UA1175	SFO → HNL San Francisco to Honolulu	1,158	85.3%
6	UA2088	SJU → ORD San Juan to Chicago	1,158	74.3%
7	UA2143	EWR → SJU Newark to San Juan	1,158	74.2%
8	UA668	SJU → IAH San Juan to Houston	1,158	76.3%
9	UA219	ORD → HNL Chicago to Honolulu	1,158	84.7%
10	UA757	SEA → DEN Seattle to Denver	1,158	83.9%
11	UA302	DTW → DEN Detroit to Denver	1,158	82.9%
12	UA384	DEN → HNL Denver to Honolulu	1,158	79.3%
13	UA2219	SJU → EWR San Juan to Newark	1,158	77.6%
14	UA1556	EWR → SJU Newark to San Juan	1,158	77.5%
15	UA1173	SJU → EWR San Juan to Newark	1,158	66.3%
16	UA253	IAH → HNL Houston to Honolulu	1,158	70.4%
17	UA1996	ORD → SJU Chicago to San Juan	1,158	81.8%
18	UA1192	IAH → SJU Houston to San Juan	1,158	79.0%
19	UA1158	LAX → HNL Los Angeles to Honolulu	1,157	85.3%
20	UA218	HNL → ORD Honolulu to Chicago	1,157	91.4%
21	UA777	ORD → LAS Chicago to Las Vegas	1,157	76.6%
22	UA787	IAH → ORD Houston to Chicago	1,156	71.1%
23	UA747	SEA → ORD Seattle to Chicago	1,155	84.9%
24	UA2036	SJU → EWR San Juan to Newark	1,155	81.3%
25	UA498	DEN → PDX Denver to Portland	1,155	73.6%
26	UA647	BOS → DEN Boston to Denver	1,155	89.2%
27	UA226	BOS → IAH Boston to Houston	1,155	91.9%
28	UA1543	EWR → SJU Newark to San Juan	1,155	62.2%
29	UA303	MCI → ORD Kansas City to Chicago	1,154	80.2%
30	UA1208	DEN → SMF Denver to Sacramento	1,154	81.8%
31	UA1740	ORD → RSW Chicago to Fort Myers	1,154	91.1%
32	UA2146	LAX → DEN Los Angeles to Denver	1,153	76.4%
33	UA586	DEN → MCI Denver to Kansas City	1,152	84.2%
34	UA590	BWI → ORD Baltimore to Chicago	1,150	63.4%
35	UA544	IAH → CLE Houston to Cleveland	1,150	86.2%
36	UA414	BOS → DEN Boston to Denver	1,143	90.1%
37	UA1645	CLE → IAH Cleveland to Houston	1,142	87.6%
38	UA1509	SFO → HNL San Francisco to Honolulu	1,137	80.2%
39	UA259	DEN → MCO Denver to Orlando	1,137	72.5%
40	UA1607	IND → DEN Indianapolis to Denver	1,136	86.9%
41	UA1520	MCO → DEN Orlando to Denver	1,134	86.6%
42	UA641	IAD → BOS Washington to Boston	1,134	91.8%
43	UA1492	ORD → CMH Chicago to Columbus	1,133	67.0%
44	UA655	DEN → LAS Denver to Las Vegas	1,133	69.9%
45	UA2102	LAS → ORD Las Vegas to Chicago	1,127	89.2%
46	UA300	SFO → HNL San Francisco to Honolulu	1,123	81.1%
47	UA1362	DEN → BWI Denver to Baltimore	1,122	87.5%
48	UA737	SEA → SFO Seattle to San Francisco	1,120	68.6%
49	UA2136	BOS → IAD Boston to Washington	1,119	71.2%
50	UA2132	DEN → SMF Denver to Sacramento	1,116	72.4%
51	UA1199	DEN → IND Denver to Indianapolis	1,114	70.2%
52	UA1416	LAX → IAH Los Angeles to Houston	1,113	91.9%
53	UA1869	IAD → SAT Washington to San Antonio	1,113	75.5%
54	UA767	ORD → DEN Chicago to Denver	1,112	68.9%
55	UA2125	BNA → IAD Nashville to Washington	1,112	79.0%
56	UA1959	ANC → DEN Anchorage to Denver	1,109	85.9%
57	UA1073	IAD → MIA Washington to Miami	1,109	87.1%
58	UA617	DEN → ORD Denver to Chicago	1,108	75.0%
59	UA2277	IAD → TPA Washington to Tampa	1,108	86.3%
60	UA1320	DEN → SNA Denver to Santa Ana	1,107	84.6%
61	UA1621	LAX → MCO Los Angeles to Orlando	1,105	87.6%
62	UA2021	IAD → SJU Washington to San Juan	1,105	87.2%
63	UA1930	IAD → SAN Washington to San Diego	1,103	91.1%
64	UA2205	CMH → IAH Columbus to Houston	1,101	84.6%
65	UA2295	EWR → MIA Newark to Miami	1,101	76.7%
66	UA1026	DEN → AUS Denver to Austin	1,096	82.4%
67	UA1895	IAH → PHX Houston to Phoenix	1,094	84.3%
68	UA430	DEN → ONT Denver to Ontario	1,092	85.6%
69	UA1281	DEN → SAN Denver to San Diego	1,092	81.4%
70	UA2116	IAD → DFW Washington to Dallas–Fort Worth	1,091	65.8%
71	UA1635	LAX → IAD Los Angeles to Washington	1,090	85.6%
72	UA1541	DEN → MSY Denver to New Orleans	1,088	73.4%
73	UA2285	SMF → DEN Sacramento to Denver	1,087	94.1%
74	UA2476	SAN → DEN San Diego to Denver	1,087	88.8%
75	UA658	MSP → ORD Minneapolis to Chicago	1,085	63.4%
76	UA405	DEN → LAX Denver to Los Angeles	1,084	88.2%
77	UA1766	BNA → DEN Nashville to Denver	1,083	81.6%
78	UA492	EWR → IAH Newark to Houston	1,083	92.5%
79	UA2309	DEN → SAN Denver to San Diego	1,080	87.7%
80	UA1665	SFO → BOS San Francisco to Boston	1,076	81.9%
81	UA540	DEN → SAN Denver to San Diego	1,070	68.0%
82	UA379	IAD → MCO Washington to Orlando	1,068	83.0%
83	UA688	IAD → BOS Washington to Boston	1,067	61.8%
84	UA2613	DEN → EWR Denver to Newark	1,066	62.3%
85	UA1305	DEN → ATL Denver to Atlanta	1,064	70.3%
86	UA2117	SAN → SFO San Diego to San Francisco	1,061	78.5%
87	UA574	LAS → SFO Las Vegas to San Francisco	1,061	76.0%
88	UA2400	BOS → SFO Boston to San Francisco	1,056	61.2%
89	UA505	SFO → IAH San Francisco to Houston	1,054	82.8%
90	UA280	DEN → ANC Denver to Anchorage	1,050	81.0%
91	UA2047	LAS → SFO Las Vegas to San Francisco	1,048	73.3%
92	UA2329	DEN → ORD Denver to Chicago	1,047	81.4%
93	UA2129	SAN → IAD San Diego to Washington	1,047	87.8%
94	UA664	LAS → ORD Las Vegas to Chicago	1,047	91.7%
95	UA697	DCA → IAH Washington to Houston	1,047	90.5%
96	UA2666	DEN → SNA Denver to Santa Ana	1,041	91.4%
97	UA1827	SAN → EWR San Diego to Newark	1,037	88.6%
98	UA1743	IAH → LAX Houston to Los Angeles	1,035	79.7%
99	UA1545	CLE → IAH Cleveland to Houston	1,033	86.1%
100	UA595	AUS → DEN Austin to Denver	1,030	86.4%
101	UA426	DTW → ORD Detroit to Chicago	1,028	68.0%
102	UA2475	MCO → ORD Orlando to Chicago	1,026	84.3%
103	UA2087	DEN → IAD Denver to Washington	1,022	79.9%
104	UA516	ATL → ORD Atlanta to Chicago	1,019	77.6%
105	UA1826	EWR → SAN Newark to San Diego	1,018	82.0%
106	UA1990	AUS → ORD Austin to Chicago	1,018	71.0%
107	UA1644	SJU → IAH San Juan to Houston	1,016	94.0%
108	UA2149	DEN → SMF Denver to Sacramento	1,016	92.0%
109	UA1938	IAD → PHX Washington to Phoenix	1,014	77.3%
110	UA1626	EWR → SAN Newark to San Diego	1,009	78.6%
111	UA1798	IAH → PHX Houston to Phoenix	1,008	83.2%
112	UA2235	MSY → EWR New Orleans to Newark	1,007	73.7%
113	UA327	SAN → EWR San Diego to Newark	1,006	79.1%
114	UA2639	DFW → IAD Dallas–Fort Worth to Washington	1,005	89.2%
115	UA427	SAN → EWR San Diego to Newark	1,004	81.4%
116	UA563	ORD → EWR Chicago to Newark	1,003	90.3%
117	UA377	DEN → ORD Denver to Chicago	1,002	75.7%
118	UA1561	DEN → SFO Denver to San Francisco	1,000	73.0%
119	UA732	DEN → MSP Denver to Minneapolis	1,000	79.3%
120	UA2636	CLE → MCO Cleveland to Orlando	1,000	92.4%
121	UA623	LGA → ORD New York to Chicago	999	86.4%
122	UA489	DEN → IAH Denver to Houston	996	71.5%
123	UA1022	DEN → SAT Denver to San Antonio	991	86.7%
124	UA1730	LAX → MCO Los Angeles to Orlando	989	89.4%
125	UA1716	BNA → DEN Nashville to Denver	987	86.7%
126	UA648	EWR → SFO Newark to San Francisco	987	73.6%
127	UA1983	MIA → ORD Miami to Chicago	984	81.7%
128	UA1247	DEN → PDX Denver to Portland	984	89.9%
129	UA1221	HNL → LAX Honolulu to Los Angeles	984	91.9%
130	UA2408	DEN → IAD Denver to Washington	983	68.8%
131	UA1240	DFW → IAD Dallas–Fort Worth to Washington	983	76.6%
132	UA2269	DEN → RDU Denver to Raleigh–Durham	982	85.2%
133	UA1769	RDU → SFO Raleigh–Durham to San Francisco	980	72.7%
134	UA708	MCI → DEN Kansas City to Denver	978	88.8%
135	UA2497	IAD → ORD Washington to Chicago	977	56.3%
136	UA1715	DEN → EWR Denver to Newark	977	64.5%
137	UA2276	IAD → LAX Washington to Los Angeles	975	68.9%
138	UA1140	IAD → TPA Washington to Tampa	974	72.2%
139	UA2065	MCO → IAD Orlando to Washington	973	78.5%
140	UA2196	AUS → IAH Austin to Houston	972	82.7%
141	UA2670	DFW → IAH Dallas–Fort Worth to Houston	972	75.6%
142	UA475	DEN → IAH Denver to Houston	971	71.3%
143	UA1976	BOS → IAH Boston to Houston	970	84.9%
144	UA358	DFW → IAD Dallas–Fort Worth to Washington	968	82.8%
145	UA1389	CMH → DEN Columbus to Denver	963	75.8%
146	UA1776	ORD → PHL Chicago to Philadelphia	961	63.8%
147	UA1149	SFO → EWR San Francisco to Newark	959	83.7%
148	UA2434	EWR → LAX Newark to Los Angeles	955	83.3%
149	UA1575	DEN → PHL Denver to Philadelphia	955	86.2%
150	UA1431	LAX → HNL Los Angeles to Honolulu	953	83.2%
151	UA486	CLE → DEN Cleveland to Denver	951	83.4%
152	UA1046	ATL → ORD Atlanta to Chicago	949	67.7%
153	UA2447	AUS → DEN Austin to Denver	946	76.2%
154	UA340	ATL → DEN Atlanta to Denver	943	89.5%
155	UA1101	DEN → IAD Denver to Washington	942	91.2%
156	UA1765	PIT → DEN Pittsburgh to Denver	940	90.3%
157	UA1310	LGA → ORD New York to Chicago	938	86.1%
158	UA652	DEN → STL Denver to St. Louis	937	84.8%
159	UA2024	SJU → IAD San Juan to Washington	936	81.3%
160	UA557	CHS → DEN Charleston to Denver	935	72.2%
161	UA2331	TPA → IAD Tampa to Washington	932	91.4%
162	UA1368	SJU → DEN San Juan to Denver	929	78.1%
163	UA1339	DEN → SJU Denver to San Juan	929	76.6%
164	UA682	SAN → DEN San Diego to Denver	926	74.8%
165	UA2326	ORD → TPA Chicago to Tampa	926	89.1%
166	UA406	LAS → EWR Las Vegas to Newark	925	83.1%
167	UA235	ATL → DEN Atlanta to Denver	924	77.0%
168	UA1792	EWR → DEN Newark to Denver	924	68.5%
169	UA1289	CHS → EWR Charleston to Newark	923	93.3%
170	UA1755	FLL → ORD Fort Lauderdale to Chicago	921	85.4%
171	UA1220	DEN → DTW Denver to Detroit	920	70.6%
172	UA2665	ORD → IAH Chicago to Houston	920	71.1%
173	UA1107	SFO → AUS San Francisco to Austin	919	92.2%
174	UA1668	AUS → SFO Austin to San Francisco	916	79.2%
175	UA2081	IAD → ATL Washington to Atlanta	913	65.9%
176	UA2468	EWR → MSY Newark to New Orleans	912	83.9%
177	UA1700	LAX → EWR Los Angeles to Newark	912	79.2%
178	UA2232	ORD → MSP Chicago to Minneapolis	909	90.4%
179	UA2679	EWR → LAX Newark to Los Angeles	907	78.2%
180	UA2377	LAX → IAH Los Angeles to Houston	906	85.0%
181	UA2379	SEA → IAH Seattle to Houston	902	81.5%
182	UA793	ORD → DFW Chicago to Dallas–Fort Worth	901	72.5%
183	UA1207	EWR → JAX Newark to Jacksonville	900	91.4%
184	UA662	BOS → DEN Boston to Denver	898	90.2%
185	UA740	IAH → PDX Houston to Portland	895	85.3%
186	UA602	ORD → PHX Chicago to Phoenix	894	73.4%
187	UA1093	DEN → LAX Denver to Los Angeles	894	91.4%
188	UA683	IAD → TPA Washington to Tampa	894	89.3%
189	UA1886	IAH → EWR Houston to Newark	892	88.8%
190	UA2608	LAS → IAH Las Vegas to Houston	891	95.9%
191	UA1673	CLE → ORD Cleveland to Chicago	891	60.2%
192	UA2245	IAH → MCO Houston to Orlando	891	91.4%
193	UA1157	HNL → LAX Honolulu to Los Angeles	890	81.1%
194	UA2453	JAX → IAH Jacksonville to Houston	885	92.0%
195	UA500	IND → SFO Indianapolis to San Francisco	882	85.4%
196	UA570	BOS → EWR Boston to Newark	881	90.2%
197	UA701	IAH → SJU Houston to San Juan	878	85.3%
198	UA1793	DCA → ORD Washington to Chicago	876	93.6%
199	UA1179	IAH → AUS Houston to Austin	876	80.3%
200	UA1634	DFW → ORD Dallas–Fort Worth to Chicago	875	84.4%
201	UA1687	IAH → IND Houston to Indianapolis	873	83.6%
202	UA1680	LAX → IAH Los Angeles to Houston	870	84.7%
203	UA2414	ORD → BNA Chicago to Nashville	870	85.6%
204	UA2019	LAX → SFO Los Angeles to San Francisco	865	71.8%
205	UA2647	SFO → BOS San Francisco to Boston	864	83.1%
206	UA1945	IAH → LAX Houston to Los Angeles	862	83.1%
207	UA2389	LGA → ORD New York to Chicago	858	93.6%
208	UA609	CLE → ORD Cleveland to Chicago	857	89.2%
209	UA2380	SFO → HNL San Francisco to Honolulu	857	75.5%
210	UA2240	DEN → LAX Denver to Los Angeles	856	75.7%
211	UA1481	DEN → PHX Denver to Phoenix	856	84.3%
212	UA578	DEN → DFW Denver to Dallas–Fort Worth	855	79.3%
213	UA1383	IAH → SNA Houston to Santa Ana	854	87.7%
214	UA1787	DEN → OMA Denver to Omaha	854	70.0%
215	UA1605	LAX → BWI Los Angeles to Baltimore	851	89.9%
216	UA2425	EWR → IAH Newark to Houston	847	66.3%
217	UA456	DEN → AUS Denver to Austin	844	91.1%
218	UA632	ATL → IAD Atlanta to Washington	844	87.9%
219	UA2096	LAX → EWR Los Angeles to Newark	842	80.0%
220	UA1947	HNL → SFO Honolulu to San Francisco	839	85.6%
221	UA1608	EWR → BNA Newark to Nashville	839	74.4%
222	UA1689	IAD → LAX Washington to Los Angeles	837	91.4%
223	UA1326	AUS → IAH Austin to Houston	835	68.4%
224	UA2652	ORD → CLE Chicago to Cleveland	835	67.5%
225	UA459	PDX → DEN Portland to Denver	829	96.4%
226	UA2345	DEN → EWR Denver to Newark	826	94.1%
227	UA484	DEN → ABQ Denver to Albuquerque	823	69.3%
228	UA2153	CLE → SFO Cleveland to San Francisco	823	91.7%
229	UA2253	IAD → MSY Washington to New Orleans	823	91.1%
230	UA1912	LAX → DEN Los Angeles to Denver	818	90.8%
231	UA1007	DEN → SFO Denver to San Francisco	817	66.4%
232	UA2356	LAS → SFO Las Vegas to San Francisco	817	60.3%
233	UA2148	DCA → ORD Washington to Chicago	816	55.7%
234	UA2123	MCI → DEN Kansas City to Denver	813	64.7%
235	UA739	OMA → ORD Omaha to Chicago	812	71.2%
236	UA1995	SFO → LAS San Francisco to Las Vegas	812	82.7%
237	UA1979	EWR → TPA Newark to Tampa	812	93.2%
238	UA2327	DEN → OMA Denver to Omaha	811	82.1%
239	UA1525	EWR → ORD Newark to Chicago	806	80.4%
240	UA1364	EWR → FLL Newark to Fort Lauderdale	806	91.7%
241	UA2486	SAN → ORD San Diego to Chicago	803	81.7%
242	UA1418	DEN → MIA Denver to Miami	803	70.1%
243	UA2316	DEN → LAS Denver to Las Vegas	803	91.0%
244	UA779	AUS → DEN Austin to Denver	799	89.8%
245	UA1783	LAX → BOS Los Angeles to Boston	796	83.5%
246	UA2210	LAX → BOS Los Angeles to Boston	796	89.0%
247	UA555	ATL → EWR Atlanta to Newark	792	64.6%
248	UA1442	DEN → LGA Denver to New York	790	89.0%
249	UA446	EWR → LAS Newark to Las Vegas	789	82.5%
250	UA467	ORD → MSP Chicago to Minneapolis	788	75.0%
251	UA1392	MSY → IAD New Orleans to Washington	785	91.0%
252	UA611	SFO → LAS San Francisco to Las Vegas	785	78.1%
253	UA1169	HNL → LAX Honolulu to Los Angeles	777	90.7%
254	UA2273	DEN → MSY Denver to New Orleans	777	86.5%
255	UA2667	LAX → IAD Los Angeles to Washington	777	89.3%
256	UA1720	DEN → IAH Denver to Houston	773	89.5%
257	UA2040	BOS → ORD Boston to Chicago	768	57.7%
258	UA376	AUS → IAD Austin to Washington	766	84.0%
259	UA254	EWR → ORD Newark to Chicago	763	46.9%
260	UA488	BUR → SFO Burbank to San Francisco	762	83.4%
261	UA644	DEN → PDX Denver to Portland	759	83.7%
262	UA2098	BOS → IAD Boston to Washington	757	89.5%
263	UA1006	LAX → LAS Los Angeles to Las Vegas	750	90.1%
264	UA2435	IAD → SMF Washington to Sacramento	744	78.4%
265	UA1370	TPA → IAD Tampa to Washington	744	72.9%
266	UA1003	DEN → CHS Denver to Charleston	741	83.1%
267	UA1802	PDX → EWR Portland to Newark	739	83.9%
268	UA1233	DEN → EWR Denver to Newark	738	70.9%
269	UA1934	IAH → CLE Houston to Cleveland	735	82.9%
270	UA2407	RDU → IAH Raleigh–Durham to Houston	733	77.5%
271	UA2656	SNA → DEN Santa Ana to Denver	732	85.0%
272	UA501	DEN → MCO Denver to Orlando	731	70.4%
273	UA674	CHS → EWR Charleston to Newark	725	85.6%
274	UA1323	IAD → LAS Washington to Las Vegas	725	92.4%
275	UA1577	ORD → SFO Chicago to San Francisco	723	75.8%
276	UA1825	IAD → FLL Washington to Fort Lauderdale	722	87.0%
277	UA1302	DEN → SAN Denver to San Diego	720	85.5%
278	UA1616	BNA → ORD Nashville to Chicago	720	84.8%
279	UA561	ORD → MCI Chicago to Kansas City	719	81.0%
280	UA347	DEN → IAD Denver to Washington	716	82.4%
281	UA2130	DEN → MEM Denver to Memphis	713	71.9%
282	UA2601	DEN → RSW Denver to Fort Myers	712	86.0%
283	UA1806	HNL → DEN Honolulu to Denver	711	81.6%
284	UA1414	BOS → ORD Boston to Chicago	708	93.2%
285	UA1799	IAH → LAS Houston to Las Vegas	705	86.9%
286	UA1638	DEN → LAX Denver to Los Angeles	705	90.2%
287	UA1836	DEN → MKE Denver to Milwaukee	704	83.9%
288	UA721	BOS → IAD Boston to Washington	703	73.9%
289	UA1805	DEN → HNL Denver to Honolulu	703	66.2%
290	UA2411	DEN → BUR Denver to Burbank	701	67.5%
291	UA1213	EWR → MCO Newark to Orlando	700	72.5%
292	UA1739	EWR → MCO Newark to Orlando	695	78.8%
293	UA1949	IAH → DFW Houston to Dallas–Fort Worth	693	69.5%
294	UA491	IAH → MSY Houston to New Orleans	691	90.8%
295	UA1833	BOS → EWR Boston to Newark	691	92.6%
296	UA1327	ATL → DEN Atlanta to Denver	687	88.4%
297	UA1812	DEN → SFO Denver to San Francisco	686	77.8%
298	UA1565	DEN → DFW Denver to Dallas–Fort Worth	685	66.0%
299	UA2022	SJU → IAD San Juan to Washington	685	95.3%
300	UA496	IAH → MCO Houston to Orlando	683	76.6%
301	UA1829	DEN → IAH Denver to Houston	682	70.9%
302	UA2664	SFO → BWI San Francisco to Baltimore	681	89.0%
303	UA2191	EWR → LAX Newark to Los Angeles	680	73.4%
304	UA2120	EWR → DEN Newark to Denver	680	75.9%
305	UA404	IAH → EWR Houston to Newark	677	67.1%
306	UA679	CLE → LAX Cleveland to Los Angeles	675	89.6%
307	UA2662	IAH → MCO Houston to Orlando	673	83.8%
308	UA1963	DEN → SLC Denver to Salt Lake City	673	78.2%
309	UA1942	DEN → AUS Denver to Austin	672	68.8%
310	UA1609	DFW → IAH Dallas–Fort Worth to Houston	672	62.7%
311	UA2076	DEN → MSP Denver to Minneapolis	668	69.6%
312	UA308	PHL → ORD Philadelphia to Chicago	666	62.4%
313	UA1337	DEN → PDX Denver to Portland	664	82.4%
314	UA2344	AUS → IAD Austin to Washington	659	88.8%
315	UA2446	DEN → LGA Denver to New York	658	82.5%
316	UA1997	IAD → EWR Washington to Newark	657	63.7%
317	UA1734	BOS → IAD Boston to Washington	654	96.0%
318	UA2412	BWI → DEN Baltimore to Denver	653	89.4%
319	UA1549	IAH → IAD Houston to Washington	653	92.9%
320	UA2491	IAH → SAN Houston to San Diego	651	84.9%
321	UA2610	LAX → DEN Los Angeles to Denver	650	87.6%
322	UA1501	IAH → TPA Houston to Tampa	649	78.0%
323	UA2305	SBA → SFO Santa Barbara to San Francisco	648	61.8%
324	UA1757	IAD → SFO Washington to San Francisco	647	55.7%
325	UA2078	IAH → PHX Houston to Phoenix	645	71.2%
326	UA1077	ORD → DCA Chicago to Washington	645	89.9%
327	UA1182	CMH → ORD Columbus to Chicago	643	45.5%
328	UA597	DEN → BOS Denver to Boston	641	68.5%
329	UA2086	IAH → CMH Houston to Columbus	640	73.5%
330	UA1855	LAX → EWR Los Angeles to Newark	637	64.4%
331	UA1524	IAD → IAH Washington to Houston	637	87.8%
332	UA1754	SFO → LAX San Francisco to Los Angeles	636	74.5%
333	UA1421	ORD → FLL Chicago to Fort Lauderdale	636	90.7%
334	UA320	DEN → IAH Denver to Houston	636	94.9%
335	UA546	EWR → ORD Newark to Chicago	633	63.4%
336	UA373	HNL → SFO Honolulu to San Francisco	632	90.6%
337	UA755	IAD → BOS Washington to Boston	631	78.7%
338	UA1966	AUS → IAH Austin to Houston	628	94.8%
339	UA661	EWR → ORD Newark to Chicago	627	51.2%
340	UA1095	IAD → SFO Washington to San Francisco	627	87.7%
341	UA660	ORD → SAN Chicago to San Diego	621	86.0%
342	UA1678	SFO → DCA San Francisco to Washington	619	88.2%
343	UA2290	ORD → DFW Chicago to Dallas–Fort Worth	619	74.7%
344	UA2089	SJU → ORD San Juan to Chicago	617	95.9%
345	UA1444	IAH → EWR Houston to Newark	613	73.4%
346	UA2224	IAH → DCA Houston to Washington	607	67.7%
347	UA2441	BOS → SFO Boston to San Francisco	606	86.7%
348	UA2113	LAX → ORD Los Angeles to Chicago	605	79.2%
349	UA2124	IAH → ORD Houston to Chicago	605	86.5%
350	UA1422	DEN → STL Denver to St. Louis	603	65.8%

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · A flight number is a slot in a schedule and gets reassigned to different city pairs over time, so each is measured only on the route it currently operates. Numbers with fewer than 600 operations on that route, or last flown more than a quarter ago, are not listed. Schedules change — confirm a departure still operates before booking around it.

← Back to the United Airlines profile

Analysis last recomputed October 26, 2026