Denver International Airport
Denver, United StatesDEN / KDEN
International hub · 203 direct destinations · 6 runways · longest runway 16,001 ft
32 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Denver → Seattle
DEN
DenverDenver International Airport
DenverDenver International AirportBFISeattleKing County International Airport - Boeing Field
SeattleKing County International Airport - Boeing Field- Distance
- 1,024 mi
- Estimated flight time
- ~2h 35m
Seattle is currently 1 hour behind Denver.
Observed nonstop
How often does this route fly?
Frequency
Daily at most
On average around 1 flights a day, observed from October 2025 to September 2026.
- 1
- flights per day
- 1
- busiest month · Oct
- 2 hr 20 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 1Jan2026
- 1Feb
- 1Mar
- 1Apr
- 1May
- 1Jun
- 1Jul
- 1Aug
- 1Sep
- 1Oct2025
- 1Nov
- 1Dec
Airlines
Who flies it
UPS Airlinesall year
Air Canadanow and then
Delta Air Linesnow and then
Through the day
Departure times
Local time in Denver. Most departures between 02:00 and 05:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 0.1Mon
- 0.8Tue
- 0.9Wed
- 1Thu
- 0.9Fri
- 0.1Sat
- 0.1Sun
Fleet
Aircraft observed
- Boeing 767-300B76353%
- Boeing 757-200B75233%
- Airbus A320A3202%
- Bombardier Global 7500GL7T2%
- Boeing 737-800B7381%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 1 | 16 |
|
| February 2026 | 1 | 18 |
|
| March 2026 | 1 | 18 |
|
| April 2026 | 1 | 22 |
|
| May 2026 | 1 | 18 |
|
| June 2026 | 1 | 18 |
|
| July 2026 | 1 | 23 |
|
| August 2026 | 1 | 20 |
|
| September 2026 | 1 | 16 |
|
| October 2025 | 1 | 18 |
|
| November 2025 | 1 | 12 |
|
| December 2025 | 1 | 2 |
|
Airlines observed on this route
From observed callsign routes on DEN-BFI - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Denver: 203.
- Direct destinations observed from Seattle: 63.
The airports on this route
King County International Airport - Boeing Field
Seattle, United StatesBFI / KBFI
Regional airport · 63 direct destinations · 2 runways · longest runway 10,007 ft
47 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Denver to Seattle
The observed direct connection between Denver International Airport (DEN) and King County International Airport - Boeing Field (BFI) covers approximately 1,024 mi. The estimated flight time is around 2h 35m. Air Canada, Delta Air Lines and UPS Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Denver from Seattle by air?
- The great-circle distance between Denver International Airport and King County International Airport - Boeing Field is approximately 1,024 mi.
- How long is the flight from Denver to Seattle?
- Based on the distance, the estimated flight time is about 2h 35m. This is an estimate, not a schedule.
- Is there a direct connection from Denver to Seattle?
- Yes, a direct connection between DEN and BFI has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Air Canada, Delta Air Lines and UPS Airlines.
- How often is there a flight from Denver to Seattle?
- On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 201 observed flights. Mainly UPS Airlines, Air Canada, Delta Air Lines. That is an observation, not a timetable.
- What is the current time difference between Denver and Seattle?
- Seattle is currently 1 hour behind Denver.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.