Route profile
BOS→DFW
Flight reliability, delays and best times to fly from Boston to Dallas–Fort Worth, 1,562 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 20% of comparable major US routes (4,598 compared)
Calculated from 12,018 flights. How this is calculated
BOS → DFW arrives on time 76.1% of the time; the return trip, DFW → BOS, arrives on time 70.0% of the time, a 6.0-point gap between the two directions of the same city pair.
BOS → DFW spends 35.5 minutes on the ground on a 1,562-mile trip: 21.0 minutes from pushback to wheels-up at BOS and 14.5 minutes from touchdown to gate at DFW.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
Every day of the week performs about the same on this route, steadier than 97% of 4,467 comparable routes.
78.1% on time on the best day (Tuesday) against 74.4% on the worst (Monday).
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 4,467 in the comparison.
Why BOS → DFW flights are cancelled
July 2023 – July 2026
BOS → DFW cancelled 258 of 12,018 scheduled flights — about 1 in every 47. The reason filed most often was extreme weather, 76.0% of the cancellations coded on this route — about 1 in every 61 scheduled flights.
Share of cancellations
Of 258 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
196 cancellations, 76.0% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
49 cancellations, 19.0% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
13 cancellations, 5.0% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
258 coded cancellations were recorded on BOS → DFW; the section appears from 50.
When it goes wrong
July 2023 – July 2026
59 min late
against a median of 9 min early
BOS → DFW has an average that understates its risk: a typical arrival is 9 min early, but the worst tenth are 68 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 12,018 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at DFW after arriving from BOS.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 37% | Likely to miss |
| 45 min | 23% | High risk |
| 60 min | 16% | High risk |
| 90 min | 9.8% | Some risk |
| 120 min | 6.3% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 2.15% of the time and diverts 0.76% of the time, which a late arrival never shows up in.
Chance of missing is the share of 11,669 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 59 minutes late (90th-percentile gate arrival delay), over 12,018 operations.
Any other layover length: connection checker.
Best time to fly
BOS → DFW flights departing 5–9 AM arrived on time 86.1% of the time, against 62.5% for 6–9 PM departures, a gap of 23.6 percentage points.
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 91.4% on time from 746 flights
- 6 AM: 88.7% on time from 578 flights
- 7 AM: 84.1% on time from 2,020 flights
- 8 AM: 84.9% on time from 1,172 flights
- 9 AM: 78.4% on time from 329 flights
- 10 AM: 79.6% on time from 580 flights
- 11 AM: 70.4% on time from 209 flights
- 12 PM: 77.6% on time from 1,184 flights
- 1 PM: 70.4% on time from 302 flights
- 2 PM: 71.3% on time from 1,744 flights
- 3 PM: 61.7% on time from 199 flights
- 4 PM: 65.1% on time from 920 flights
- 5 PM: 66.5% on time from 489 flights
- 6 PM: 63.7% on time from 1,049 flights
- 7 PM: 61.0% on time from 363 flights
- 8 PM: 57.5% on time from 133 flights
- 9 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why BOS → DFW runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for BOS → DFW. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on BOS → DFW, at 36.7%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 86.1% of the time and 6–9 PM departures 62.5%.
How this route holds up in bad weather
July 2023 – July 2026
The harder-hit end is DFW, where the flight lands. Its figure counts departures from DFW, so it says more about how that airport copes than about this route. Bad weather cancels 7.0 times the normal rate at DFW against 3.9 times at BOS. Cancelled in bad weather against normal hours: BOS 5.3% against 1.4%, DFW 10.4% against 1.5%. Flights that did leave DFW in bad weather arrived on time 56.4% of the time, against 74.4% in normal hours.
Bad weather and normal hours at the airports
Scheduled departures, July 2023 – July 2026| Departures from | BOS | DFW |
|---|---|---|
| Cancelled in bad weather | 5.3% | 10.4% |
| Cancelled in normal hours | 1.4% | 1.5% |
| Arrived on time, bad weather | 65.1% | 56.4% |
| Arrived on time, normal hours | 79.7% | 74.4% |
| Departures in bad weather | 60,840 | 72,822 |
Of the carriers on this route, Delta Air Lines (3.1% cancelled against 5.8% for the other carriers at BOS) cancelled the fewest departures from BOS in bad weather and Spirit Airlines (7.8% cancelled against 4.4% for the other carriers at BOS) the most.
This route’s airlines in bad weather at BOS
All departures from BOS| Airline | Bad-weather departures | Cancelled | Other carriers |
|---|---|---|---|
| Delta Air Lines | 10,971 | 3.1%below the others | 5.8% |
| American Airlines | 6,964 | 4.7%below the others | 5.5% |
| JetBlue | 17,332 | 5.4%about level | 5.1% |
| Spirit Airlines | 2,112 | 7.8%above the others | 4.4% |
These are airport figures, not route figures: every scheduled departure from BOS and DFW, to any destination, in hours the weather report called bad. The airline rows count each carrier’s departures from BOS on every route.
Weather source and limits. In full: BOS (airlines), DFW, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| American Airlines | 7,722 | 78.3% | 2.45% | -11 min | 8.9% |
| Delta Air Lines | 2,886 | 75.4% | 1.39% | -9 min | 10.9% |
| JetBlue | 942 | 68.0% | 1.59% | -3 min | 13.0% |
| Spirit Airlines | 351 | 59.5% | 1.99% | 5 min | 18.7% |
American Airlines flew 64.9% of the 11,901 flights listed. American Airlines cancelled 2.45% of its flights here against 1.39% for Delta Air Lines.
American Airlines arrived on time 18.8 percentage points more often than Spirit Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
AA2527 (6:00 AM) arrived on time 91.0% of the time, 17.9 points more often than DL303 (7:40 PM) at 73.1%.
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Monday the least, a gap of 3.7 percentage points.
By month
- Jan: 73.3%
- Feb: 81.5%
- Mar: 82.4%
- Apr: 75.4%
- May: 69.9%
- Jun: 72.8%
- Jul: 70.5%
- Aug: 74.2%
- Sep: 76.6%
- Oct: 80.1%
- Nov: 81.4%
- Dec: 79.5%
May is historically the weakest month and March the strongest, a spread of 12.5 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 62.1% from 335 flights
- August 2023: 68.6% from 340 flights
- September 2023: 76.3% from 319 flights
- October 2023: 74.9% from 354 flights
- November 2023: 80.4% from 316 flights
- December 2023: 86.6% from 292 flights
- January 2024: 68.5% from 283 flights
- February 2024: 88.9% from 271 flights
- March 2024: 84.1% from 302 flights
- April 2024: 72.5% from 312 flights
- May 2024: 66.3% from 383 flights
- June 2024: 70.7% from 373 flights
- July 2024: 67.9% from 405 flights
- August 2024: 77.0% from 376 flights
- September 2024: 82.0% from 340 flights
- October 2024: 89.1% from 388 flights
- November 2024: 85.8% from 327 flights
- December 2024: 79.9% from 299 flights
- January 2025: 73.9% from 292 flights
- February 2025: 74.3% from 266 flights
- March 2025: 79.2% from 317 flights
- April 2025: 72.4% from 304 flights
- May 2025: 67.8% from 378 flights
- June 2025: 75.8% from 371 flights
- July 2025: 71.5% from 369 flights
- August 2025: 76.7% from 345 flights
- September 2025: 71.0% from 313 flights
- October 2025: 75.6% from 352 flights
- November 2025: 77.5% from 292 flights
- December 2025: 71.7% from 290 flights
- January 2026: 77.9% from 287 flights
- February 2026: 81.1% from 259 flights
- March 2026: 84.3% from 273 flights
- April 2026: 81.4% from 302 flights
- May 2026: 76.4% from 328 flights
- June 2026: 71.6% from 330 flights
- July 2026: 81.1% from 335 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 77.0% against 77.5% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 12,018 BOS → DFW flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed