Boston (BOS) – Washington (BWI)
- Distance
- 594 km
- 369 mi · 321 nm
- Flight time
- 1 h 31 min / 1 h 26 min
- Average gate to gate: BOS → BWI / back
- Time difference
- none
- CO2 per passenger
- 75 kg
- One way, economy, incl. RF (44 kg CO2 only)
- Passengers / year
- 729,691
- Aug 2025 – Jul 2026 · −20.1%
- Flights / week
- 132
- Both directions, average
- Seats filled
- 78%
- 936,643 seats a year
- Airlines nonstop
- 3
- WN, YX, NK
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from BOS
- 235°
- Heading from BWI
- 52°
- Halfway point
- 40.80, -73.91
- Great-circle km
- 594 km (sphere, for EU261)
- In the air BOS → BWI
- 1 h 7 min
- In the air BWI → BOS
- 1 h 2 min
- Clocks
- Same time in both
The estimate for a route without real times is 1 h 30 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 74,874 |
| Sep 2025 | 62,023 |
| Oct 2025 | 74,375 |
| Nov 2025 | 58,678 |
| Dec 2025 | 56,101 |
| Jan 2026 | 40,530 |
| Feb 2026 | 38,603 |
| Mar 2026 | 52,608 |
| Apr 2026 | 67,157 |
| May 2026 | 69,797 |
| Jun 2026 | 66,191 |
| Jul 2026 | 68,754 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 627 |
| Sep 2025 | 568 |
| Oct 2025 | 668 |
| Nov 2025 | 555 |
| Dec 2025 | 542 |
| Jan 2026 | 450 |
| Feb 2026 | 426 |
| Mar 2026 | 519 |
| Apr 2026 | 644 |
| May 2026 | 631 |
| Jun 2026 | 601 |
| Jul 2026 | 607 |
Airlines flying BOS–BWI nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| WNSouthwest Airlines | 89 | 83% |
| YXRepublic Airline | 40 | 16% |
| NKSpirit Air Lines | 1.7 | 2% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Embraer ERJ-175 · 2,106 flights
- Boeing B737 Max 800 · 1,777 flights
- Boeing 737-700/700LR/Max 7 · 1,459 flights
- Boeing 737-800 · 1,406 flights
- Airbus Industrie A320-100/200 · 75 flights
- Airbus Industrie A320-200n · 12 flights
- Airbus Industrie A321Neoxlr · 2 flights
- A220-300 BD-500-1A11 · 1 flight
Also carried: 1,030 tonnes of freight and 0 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 77%
- Arrived within 15 min of schedule
- Average delay
- 16 min
- Late arrivals count, early ones as 0
- Cancelled
- 2.7%
- Flights counted
- 7,030
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| WNSouthwest Airlines | 75% | 17 min |
| YXRepublic Airline | 81.6% | 14 min |
| NKSpirit Air Lines | 70.5% | 16 min |
Delay minutes by cause: airline 29% · aircraft arriving late 41% · air traffic system 27% · weather 3% · security 0%.
Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources
What passengers paid
- Average fare, Q1 2026
- $219
- One way, all cabins
- Average over a year
- $191
- Q2 2025 – Q1 2026
- Largest airline
- Southwest Airlines
- 69% of passengers · $211
- Lowest-fare airline
- Southwest Airlines
- 69% of passengers · $211
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q2 2025 $168 · Q3 2025 $184 · Q4 2025 $214 · Q1 2026 $219).
Fare outlook, Q1 2027: about $224, likely $193–$255
The average fare paid we expect a year after Q1 2026, the newest DOT quarter. On this route, past forecasts made this way fell inside the range 81% of the time over 21 quarters (median error 9.6%). An estimate from US DOT data: not a price you can book, not a guarantee, not advice on when to buy. How the outlook works
Cheapest quarter on this route: Q1, typically 7% below the year's average (9 years of DOT data, without 2020–21).
U.S. DOT Consumer Airfare Report, Table 1a (airline ticket sample, US domestic airport pairs). Sources
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 594 km.
Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.
Every airport pair between Boston and Washington
Kilometres. Linked numbers have a page of their own. All Washington airports