Boston (BOS) to Denver (DEN) flights
United Airlines, Southwest Airlines, JetBlue, Delta Air Lines fly nonstop from Boston Logan International Airport to Denver International Airport, with about 86 flights a week in July 2026. The 1,754-mile flight takes about 4h 35m gate to gate.
- Distance
- 1,754 mi · 2,823 km
- Flight time
- 4h 35m
- Airlines
- 4
- Seats filled
- 89%
Airlines flying BOS to DEN
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 40 | Airbus A321, Boeing 737-900ER, Boeing 737 MAX 9 | 324,269 | 4h 35m |
| Southwest Airlines | 20 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 137,035 | 4h 32m |
| JetBlue | 19 | Airbus A220-300, Airbus A320-100/200, Airbus A321 | 88,754 | 4h 35m |
| Delta Air Lines | 7 | Airbus A321, Airbus A319, Boeing 737-900ER | 56,616 | 4h 43m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
BOS to DEN flight schedule
18 flight numbers flew this route in August 2026, 10 of them almost daily. The first usually leaves at 5:40am and the last at 8:39pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| WN 739Southwest Airlines | 5:40am | 8:00am | 20 | 75% |
| B6 493JetBlue | 6:30am | 9:03am | 31 | 87% |
| DL 499Delta Air Lines | 7:45am | 10:21am | 31 | 84% |
| UA 647United Airlines | 7:45am | 10:22am | 31 | 91% |
| WN 302Southwest Airlines | 9:25am | 11:50am | 8 | n/a |
| UA 662United Airlines | 9:35am | 12:09pm | 28 | 89% |
| B6 793JetBlue | 10:30am | 1:05pm | 31 | 61% |
| UA 414United Airlines | 11:55am | 2:28pm | 31 | 89% |
| WN 947Southwest Airlines | 1:30pm | 3:55pm | 12 | 58% |
| UA 2297United Airlines | 3:10pm | 5:44pm | 31 | 85% |
| WN 742Southwest Airlines | 3:55pm | 6:20pm | 7 | 25% |
| WN 352Southwest Airlines | 4:45pm | 7:20pm | 8 | n/a |
| WN 4251Southwest Airlines | 5:00pm | 7:35pm | 16 | 19% |
| UA 800United Airlines | 5:08pm | 7:45pm | 28 | 73% |
| WN 247Southwest Airlines | 5:10pm | 7:40pm | 4 | n/a |
| B6 993JetBlue | 8:03pm | 10:42pm | 31 | 57% |
| UA 1932United Airlines | 8:16pm | 10:51pm | 12 | 58% |
| UA 2433United Airlines | 8:39pm | 11:26pm | 10 | 54% |
Is BOS to DEN on time?
From September 2025 to August 2026, 76% of 3,847 flights arrived within 15 minutes of schedule and 1.4% were cancelled. Flights leaving around 6am were the most punctual (89%), those around 5pm the least (38%). Most delay time was caused by late-arriving aircraft (43%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,884 | 83% | 13 min | 1.1% |
| Southwest Airlines | 908 | 64% | 21 min | 1% |
| JetBlue | 690 | 68% | 21 min | 2.6% |
| Delta Air Lines | 365 | 84% | 10 min | 1.4% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 5am to 6am | 156 | 86% | |
| 6am to 7am | 234 | 89% | |
| 7am to 8am | 782 | 87% | |
| 9am to 10am | 363 | 86% | |
| 10am to 11am | 140 | 76% | |
| 11am to 12pm | 390 | 84% | |
| 12pm to 1pm | 159 | 73% | |
| 3pm to 4pm | 361 | 83% | |
| 4pm to 5pm | 401 | 67% | |
| 5pm to 6pm | 228 | 38% | |
| 6pm to 7pm | 120 | 63% | |
| 7pm to 8pm | 214 | 50% | |
| 8pm to 9pm | 185 | 61% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 391 | 64,274 | |
| September 2025 | 332 | 54,527 | |
| October 2025 | 342 | 57,033 | |
| November 2025 | 292 | 43,652 | |
| December 2025 | 300 | 48,014 | |
| January 2026 | 252 | 37,669 | |
| February 2026 | 247 | 37,130 | |
| March 2026 | 299 | 45,077 | |
| April 2026 | 284 | 44,496 | |
| May 2026 | 322 | 50,953 | |
| June 2026 | 370 | 59,790 | |
| July 2026 | 382 | 64,059 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.