Boston (BOS) – Washington (IAD)
- Distance
- 664 km
- 413 mi · 359 nm
- Flight time
- 1 h 40 min / 1 h 37 min
- Average gate to gate: BOS → IAD / back
- Time difference
- none
- CO2 per passenger
- 83 kg
- One way, economy, incl. RF (49 kg CO2 only)
- Passengers / year
- 438,615
- Aug 2025 – Jul 2026 · −2.1%
- Flights / week
- 57
- Both directions, average
- Seats filled
- 86%
- 510,059 seats a year
- Airlines nonstop
- 2
- UA, YX
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
- 237°
- Heading from IAD
- 53°
- Halfway point
- 40.70, -74.31
- Great-circle km
- 663 km (sphere, for EU261)
- In the air BOS → IAD
- 1 h 14 min
- In the air IAD → BOS
- 1 h 7 min
- Clocks
- Same time in both
The estimate for a route without real times is 1 h 35 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 42,025 |
| Sep 2025 | 40,394 |
| Oct 2025 | 38,708 |
| Nov 2025 | 35,459 |
| Dec 2025 | 36,254 |
| Jan 2026 | 28,596 |
| Feb 2026 | 26,882 |
| Mar 2026 | 35,577 |
| Apr 2026 | 36,075 |
| May 2026 | 38,021 |
| Jun 2026 | 37,214 |
| Jul 2026 | 43,410 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 267 |
| Sep 2025 | 281 |
| Oct 2025 | 247 |
| Nov 2025 | 238 |
| Dec 2025 | 246 |
| Jan 2026 | 207 |
| Feb 2026 | 195 |
| Mar 2026 | 236 |
| Apr 2026 | 240 |
| May 2026 | 246 |
| Jun 2026 | 239 |
| Jul 2026 | 331 |
Airlines flying BOS–IAD nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| UAUnited Air Lines | 55 | 99% |
| YXRepublic Airline | 1.9 | 1% |
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
- Boeing 737-900ER · 1,113 flights
- Boeing B737 Max 900 · 1,066 flights
- Boeing 737-800 · 421 flights
- Boeing B737 Max 800 · 171 flights
- Embraer ERJ-175 · 100 flights
- Airbus Industrie A319 · 44 flights
- Boeing 737-700/700LR/Max 7 · 26 flights
- Airbus Industrie A320-100/200 · 16 flights
Also carried: 179 tonnes of freight and 122 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 80.5%
- Arrived within 15 min of schedule
- Average delay
- 15 min
- Late arrivals count, early ones as 0
- Cancelled
- 2.6%
- Flights counted
- 3,030
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| UAUnited Air Lines | 80.6% | 15 min |
| YXRepublic Airline | 75.5% | 27 min |
Delay minutes by cause: airline 16% · aircraft arriving late 30% · air traffic system 50% · 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
- $190
- One way, all cabins
- Average over a year
- $198
- Q2 2025 – Q1 2026
- Largest airline
- United Air Lines
- 100% of passengers · $190
- Lowest-fare airline
- United Air Lines
- 100% of passengers · $190
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q2 2025 $198 · Q3 2025 $202 · Q4 2025 $200 · Q1 2026 $190).
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: 663 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