Boston (BOS) – Denver (DEN)
- Distance
- 2,823 km
- 1,754 mi · 1,524 nm
- Flight time
- 4 h 35 min / 3 h 50 min
- Average gate to gate: BOS → DEN / back
- Time difference
- 2 h
- CO2 per passenger
- 354 kg
- One way, economy, incl. RF (209 kg CO2 only)
- Passengers / year
- 1,202,358
- Aug 2025 – Jul 2026 · −2.9%
- Flights / week
- 147
- Both directions, average
- Seats filled
- 88%
- 1,361,583 seats a year
- Airlines nonstop
- 4
- UA, WN, B6
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
- 276°
- Heading from DEN
- 73°
- Halfway point
- 42.36, -88.17
- Great-circle km
- 2,816 km (sphere, for EU261)
- In the air BOS → DEN
- 4 h 6 min
- In the air DEN → BOS
- 3 h 23 min
- Clocks
- Denver is 2 h behind Boston
The estimate for a route without real times is 4 h 5 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 127,889 |
| Sep 2025 | 108,181 |
| Oct 2025 | 111,595 |
| Nov 2025 | 86,661 |
| Dec 2025 | 92,778 |
| Jan 2026 | 75,389 |
| Feb 2026 | 71,853 |
| Mar 2026 | 92,494 |
| Apr 2026 | 88,845 |
| May 2026 | 102,967 |
| Jun 2026 | 118,354 |
| Jul 2026 | 125,352 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 786 |
| Sep 2025 | 663 |
| Oct 2025 | 684 |
| Nov 2025 | 583 |
| Dec 2025 | 601 |
| Jan 2026 | 499 |
| Feb 2026 | 495 |
| Mar 2026 | 599 |
| Apr 2026 | 568 |
| May 2026 | 644 |
| Jun 2026 | 742 |
| Jul 2026 | 762 |
Airlines flying BOS–DEN nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| UAUnited Air Lines | 72 | 53% |
| WNSouthwest Airlines | 35 | 23% |
| B6JetBlue Airways | 26 | 14% |
| DLDelta Air Lines | 14 | 10% |
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
- Airbus Industrie A321-200n · 2,803 flights
- Boeing B737 Max 800 · 1,018 flights
- Boeing 737-800 · 956 flights
- A220-300 BD-500-1A11 · 779 flights
- Boeing 737-900ER · 584 flights
- Boeing B737 Max 900 · 551 flights
- Airbus Industrie A320-100/200 · 539 flights
- Boeing 737-700/700LR/Max 7 · 183 flights
Also carried: 625 tonnes of freight and 192 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 73.9%
- Arrived within 15 min of schedule
- Average delay
- 18 min
- Late arrivals count, early ones as 0
- Cancelled
- 1.4%
- Flights counted
- 7,740
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| UAUnited Air Lines | 80.2% | 14 min |
| WNSouthwest Airlines | 62.1% | 24 min |
| B6JetBlue Airways | 69.4% | 24 min |
| DLDelta Air Lines | 79.2% | 12 min |
Delay minutes by cause: airline 22% · aircraft arriving late 40% · air traffic system 36% · weather 1% · 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
- $246
- One way, all cabins
- Average over a year
- $249
- Q2 2025 – Q1 2026
- Largest airline
- United Air Lines
- 48% of passengers · $274
- Lowest-fare airline
- JetBlue Airways
- 16% of passengers · $193
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q2 2025 $244 · Q3 2025 $244 · Q4 2025 $262 · Q1 2026 $246).
Fare outlook, Q1 2027: about $251, likely $222–$286
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 5.6%). 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 4% 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: 2,816 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 Denver
Kilometres. Linked numbers have a page of their own. All Denver airports