Flight profile · Republic Airways
YX5594
Boston (BOS) to Memphis (MEM) · scheduled 9:15 PM – 11:34 PM
How YX5594 performs
662 operations, June 2024 – July 2026.
YX5594 arrived on time 67.2% of the time, against 74.3% for all BOS → MEM flights, so this departure is 7.1 percentage points worse than the route as a whole. Against Republic Airways’ own flights on this route it is 7.1 points worse.
Source: US DOT Bureau of Transportation Statistics · 662 operations, June 2024 – July 2026 · If YX5594 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where YX5594 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| YX5594 | 67.2% | 3.93% | -4 min | 14.7% | 662 |
| Republic Airways on BOS → MEM | 74.3% | 4.25% | -9 min | 10.5% | 1,411 |
| All BOS → MEM flights | 74.3% | 4.25% | -9 min | 10.5% | 1,411 |
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
Why YX5594 runs late
Where US DOT attributed the delay minutes on this flight.
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
Share of the delay minutes US DOT attributed to each cause for YX5594 on BOS → MEM. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies YX5594 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, YX5594 pushed back an average of 51 minutes late; when it came in on time or early, an average of 2 minutes early.
Each departure is matched to the flight the same aircraft flew into BOS just before it, using the tail number in the DOT file, 616 of 636 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| YX5594 | 33% | 74% | 7% |
| Network, same turn | 18% | 85% | 10% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 45 to 59 minutes. How often YX5594’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often YX5594 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
From pushback to gate
When it leaves BOS late, does that still matter by the time it reaches MEM?
YX5594 pushes back an average of 17.5 minutes late and reaches the gate at MEM an average of 12.6 minutes late. The 4.9 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. It spends 23.0 minutes on the taxiways at BOS, 5.1 minutes longer than a typical BOS departure in the same hour.
On arrival at MEM, YX5594 spends 6.6 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is about what any arrival at MEM spends on the ground before reaching the gate.
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached MEM. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 6,999 departures from BOS scheduled in the clock hour YX5594 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at MEM (72,783 flights), not just YX5594’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
The hour it leaves BOS
Part of any flight’s record belongs to the clock rather than to the flight. YX5594 has one departure time, so this is what that time is worth.
On-time arrival rate. 6,999 departures from BOS are scheduled in the 9 PM–10 PM hour over the period, against 440,893 across the whole day.
YX5594 is scheduled out of BOS at 9:15 PM, in the 9 PM–10 PM bank. Departures from BOS in that hour arrive on time 64.0% of the time against 77.2% across the airport’s whole day — the slot alone is worth 13.2 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from BOS to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes YX5594 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| BOS→ORD Boston to Chicago | February 12, 2026 – March 6, 2026 | 18 | — |
| ORD→BOS Chicago to Boston | February 12, 2026 – March 6, 2026 | 18 | — |
| RDU→BOS Raleigh–Durham to Boston | January 5, 2026 | 1 | — |
| JFK→MEM New York to Memphis | December 24, 2025 – January 1, 2026 | 4 | — |
| JFK→MKE New York to Milwaukee | April 5, 2025 | 1 | — |
| LGA→PIT New York to Pittsburgh | November 28, 2024 – December 14, 2024 | 4 | — |
| SDF→DTW Louisville to Detroit | September 14, 2024 | 1 | — |
| CMH→DTW Columbus to Detroit | June 8, 2024 – July 6, 2024 | 8 | — |
| BOS→CVG Boston to Cincinnati / Covington | May 7, 2024 – June 6, 2024 | 27 | — |
| CVG→BOS Cincinnati / Covington to Boston | May 7, 2024 – June 6, 2024 | 25 | — |
| BNA→BOS Nashville to Boston | April 9, 2024 – May 6, 2024 | 24 | — |
| BOS→BNA Boston to Nashville | April 9, 2024 – May 6, 2024 | 24 | — |
| BOS→MCI Boston to Kansas City | March 16, 2024 – April 6, 2024 | 4 | — |
| LGA→OMA New York to Omaha | January 13, 2024 – March 2, 2024 | 8 | — |
| LGA→BNA New York to Nashville | September 9, 2023 – January 7, 2024 | 15 | — |
| BNA→LGA Nashville to New York | December 16, 2023 – January 7, 2024 | 14 | — |
| DCA→LGA Washington to New York | October 29, 2023 – December 15, 2023 | 44 | — |
| LGA→MCI New York to Kansas City | September 17, 2023 – October 27, 2023 | 34 | — |
| MCI→LGA Kansas City to New York | September 17, 2023 – October 27, 2023 | 34 | — |
| BOS→SDF Boston to Louisville | September 5–8, 2023 | 4 | — |
| SDF→BOS Louisville to Boston | September 5–8, 2023 | 4 | — |
| BOS→ORF Boston to Norfolk | July 3, 2023 – September 4, 2023 | 57 | — |
| ORF→BOS Norfolk to Boston | July 3, 2023 – September 4, 2023 | 57 | — |
Because the same number has served different journeys, the statistics above describe only the route YX5594 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
78 min late
against a median of 4 min early
YX5594 has an average that understates its risk: a typical arrival is 4 min early, but the worst tenth are 82 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 662 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Data and methodology
Calculated by FlyerIntel from 662 records of YX5594 operating BOS → MEM, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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