--- title: "Denver (DEN) to Seattle (SEA) flights: who flies it" description: "Alaska Airlines, Delta Air Lines and 2 more airlines fly nonstop from DEN to SEA, about 97 flights a week. Upgrade and award space by date on 2LNR, next 14 days free." canonical: "https://2lnr.com/routes/den-sea" url: "https://2lnr.com/routes/den-sea.md" date_modified: "2026-10-18T05:10:47Z" --- # Denver to Seattle (DEN-SEA): nonstop upgrade & award space Alaska Airlines, United Airlines, Delta Air Lines, and Frontier Airlines fly nonstop between Denver (DEN) and Seattle (SEA), roughly 97 times a week. The timetable below shows the nonstop scheduled at 2h 57m to 3h 13m for the 1,022 miles. 2LNR checks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines flights on this route, so you can see which departures have space before you book. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. See DEN to SEA on the interactive map [Get started free](https://2lnr.com/login) 97 Flights a week, 4-week average 2h 57m to 3h 13m Scheduled flight time 1,022 mi Nonstop distance Free To get started ## Denver to Seattle flight schedule Scheduled nonstop departures for DEN to SEA starting October 24, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Denver (DEN) to Seattle (SEA) | Date | Flight | Airline | Departs DEN | Arrives SEA | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Sat, Oct 24 | DL 1731 | Delta Air Lines | 06:00 | 08:10 | 3h 10m | [Airbus A220-300](https://2lnr.com/seatmaps/dl/a220-300.md) | | Sat, Oct 24 | AS 317 | Alaska Airlines, Inc. | 07:07 | 09:10 | 3h 3m | [Boeing 737-900](https://2lnr.com/seatmaps/as/737-900.md) | | Sat, Oct 24 | F9 4545 | Frontier Airlines | 07:45 | 09:51 | 3h 6m | [Airbus A320](https://2lnr.com/seatmaps/f9/a320.md) | | Sat, Oct 24 | UA 1348 | United Airlines | 08:02 | 10:01 | 2h 59m | [Boeing 737-800](https://2lnr.com/seatmaps/ua/737-800.md) | | Sat, Oct 24 | UA 2058 | United Airlines | 11:22 | 13:21 | 2h 59m | Boeing 737-800 | | Sat, Oct 24 | AS 682 | Alaska Airlines, Inc. | 12:00 | 13:59 | 2h 59m | [Boeing 737 MAX 9](https://2lnr.com/seatmaps/as/737-max-9.md) | | Sat, Oct 24 | DL 2740 | Delta Air Lines | 12:20 | 14:31 | 3h 11m | Airbus A220-300 | | Sat, Oct 24 | F9 1175 | Frontier Airlines | 13:07 | 15:12 | 3h 5m | [Airbus A321neo family](https://2lnr.com/seatmaps/f9/a321neo.md) | | Sat, Oct 24 | DL 1358 | Delta Air Lines | 13:55 | 16:08 | 3h 13m | Airbus A220-300 | | Sat, Oct 24 | AS 567 | Alaska Airlines, Inc. | 15:30 | 17:29 | 2h 59m | [Boeing 737-800](https://2lnr.com/seatmaps/as/737-800.md) | | Sat, Oct 24 | UA 2013 | United Airlines | 15:40 | 17:37 | 2h 57m | [Boeing 737 MAX 9](https://2lnr.com/seatmaps/ua/737-max-9.md) | | Sat, Oct 24 | AS 615 | Alaska Airlines, Inc. | 17:57 | 19:58 | 3h 1m | Boeing 737 MAX 9 | | Sat, Oct 24 | DL 2543 | Delta Air Lines | 18:42 | 20:48 | 3h 6m | Airbus A220-300 | | Sat, Oct 24 | UA 2767 | United Airlines | 19:14 | 21:15 | 3h 1m | [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.md) | | Sun, Oct 25 | DL 1731 | Delta Air Lines | 06:00 | 08:10 | 3h 10m | Airbus A220-300 | | Sun, Oct 25 | AS 317 | Alaska Airlines, Inc. | 07:07 | 09:10 | 3h 3m | Boeing 737-900 | | Sun, Oct 25 | F9 4545 | Frontier Airlines | 07:45 | 09:51 | 3h 6m | Airbus A320 | | Sun, Oct 25 | UA 2271 | United Airlines | 08:02 | 10:01 | 2h 59m | Boeing 737-800 | | Sun, Oct 25 | UA 2058 | United Airlines | 11:21 | 13:20 | 2h 59m | Boeing 737-800 | | Sun, Oct 25 | UA 2302 | United Airlines | 11:45 | 13:48 | 3h 3m | [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md) | | Sun, Oct 25 | AS 682 | Alaska Airlines, Inc. | 12:00 | 13:59 | 2h 59m | Boeing 737-900 | | Sun, Oct 25 | DL 2740 | Delta Air Lines | 12:20 | 14:31 | 3h 11m | Airbus A220-300 | | Sun, Oct 25 | F9 1175 | Frontier Airlines | 13:07 | 15:12 | 3h 5m | Airbus A321neo family | | Sun, Oct 25 | DL 1358 | Delta Air Lines | 13:55 | 16:08 | 3h 13m | Airbus A220-300 | | Sun, Oct 25 | AS 567 | Alaska Airlines, Inc. | 15:30 | 17:29 | 2h 59m | [Boeing 737 MAX 8](https://2lnr.com/seatmaps/as/737-max-8.md) | | Sun, Oct 25 | UA 2013 | United Airlines | 15:40 | 17:37 | 2h 57m | Boeing 737 MAX 9 | | Sun, Oct 25 | AS 615 | Alaska Airlines, Inc. | 17:57 | 19:58 | 3h 1m | Boeing 737-900 | | Sun, Oct 25 | DL 2543 | Delta Air Lines | 18:42 | 20:48 | 3h 6m | Airbus A220-300 | | Sun, Oct 25 | UA 2767 | United Airlines | 19:14 | 21:15 | 3h 1m | Airbus A321neo family | | Sun, Oct 25 | UA 2651 | United Airlines | 21:03 | 23:04 | 3h 1m | Boeing 737 MAX 9 | | Mon, Oct 26 | DL 1731 | Delta Air Lines | 06:00 | 08:10 | 3h 10m | Airbus A220-300 | | Mon, Oct 26 | AS 317 | Alaska Airlines, Inc. | 07:07 | 09:10 | 3h 3m | Boeing 737-900 | | Mon, Oct 26 | F9 4545 | Frontier Airlines | 07:45 | 09:51 | 3h 6m | Airbus A320 | | Mon, Oct 26 | UA 2271 | United Airlines | 08:02 | 10:01 | 2h 59m | Boeing 737-800 | | Mon, Oct 26 | UA 2302 | United Airlines | 11:50 | 13:54 | 3h 4m | Boeing 737-900 | | Mon, Oct 26 | AS 682 | Alaska Airlines, Inc. | 12:00 | 13:59 | 2h 59m | Boeing 737-900 | | Mon, Oct 26 | DL 2740 | Delta Air Lines | 12:20 | 14:31 | 3h 11m | Airbus A220-300 | | Mon, Oct 26 | F9 1175 | Frontier Airlines | 13:07 | 15:12 | 3h 5m | [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md) | | Mon, Oct 26 | DL 1358 | Delta Air Lines | 13:55 | 16:08 | 3h 13m | Airbus A220-300 | | Mon, Oct 26 | AS 567 | Alaska Airlines, Inc. | 15:30 | 17:29 | 2h 59m | Boeing 737-800 | Showing the first 40 of 98 scheduled DEN to SEA departures across 7 days with service, starting October 24, 2026. Every remaining date is on the interactive map. Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every DEN to SEA date on the interactive map ## Aircraft on the Denver to Seattle nonstop In the schedule table on this page, United Airlines flies the [Boeing 737-800](https://2lnr.com/seatmaps/ua/737-800.md), the [Boeing 737 MAX 9](https://2lnr.com/seatmaps/ua/737-max-9.md), the [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.md), and the [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md). Delta Air Lines flies the [Airbus A220-300](https://2lnr.com/seatmaps/dl/a220-300.md). Alaska Airlines flies the [Boeing 737-900](https://2lnr.com/seatmaps/as/737-900.md), the [Boeing 737 MAX 9](https://2lnr.com/seatmaps/as/737-max-9.md), the [Boeing 737-800](https://2lnr.com/seatmaps/as/737-800.md), and the [Boeing 737 MAX 8](https://2lnr.com/seatmaps/as/737-max-8.md). Frontier Airlines flies the [Airbus A320](https://2lnr.com/seatmaps/f9/a320.md). The Aircraft column has the rest. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## Confirmed upgrade & award space on DEN to SEA departures 2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines, segment by segment and date by date. Open the calendar for Denver to Seattle to see which departures have space, the next 14 days free on every product and the full horizon on Pro. In the 7 days to October 19, 2026, 2LNR checked award space on Denver to Seattle departures from October 19 to November 1. Alaska Airlines had space open on 7 of 14 dates checked and Delta Air Lines on 14 of 14. ### See real availability Confirmed upgrade or award seats by date on the DEN to SEA departures 2LNR tracks, checked against live inventory so you know what's open before you book. ### Set an alert Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking. ### Plan on the map See DEN to SEA on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Denver to Seattle nonstop Carriers operating DEN to SEA nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date. - [Alaska Airlines (AS) route map](https://2lnr.com/routes/airlines/as.md)\ [The aircraft AS flies](https://2lnr.com/seatmaps/as.md) - [United Airlines (UA) route map](https://2lnr.com/routes/airlines/ua.md)\ [The aircraft UA flies](https://2lnr.com/seatmaps/ua.md) - [Delta Air Lines (DL) route map](https://2lnr.com/routes/airlines/dl.md)\ [The aircraft DL flies](https://2lnr.com/seatmaps/dl.md) - [Frontier Airlines (F9) route map](https://2lnr.com/routes/airlines/f9.md)\ [The aircraft F9 flies](https://2lnr.com/seatmaps/f9.md) See DEN to SEA on the interactive map → ## Frequently asked questions about DEN to SEA **How long is the flight from Denver (DEN) to Seattle (SEA)?** Scheduled flight times from Denver (DEN) to Seattle (SEA) run from 2h 57m to 3h 13m across the departures in the schedule table on this page. The nonstop covers about 1,022 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from DEN to SEA?** Alaska Airlines, United Airlines, Delta Air Lines, and Frontier Airlines fly DEN to SEA nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines. **How many flights a week are there from DEN to SEA?** About 97 nonstop flights a week run between Denver (DEN) and Seattle (SEA) in the current schedule, operated by Alaska Airlines, United Airlines, Delta Air Lines, and Frontier Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from DEN to SEA depart?** Scheduled DEN to SEA nonstops in the next 7 days with service leave between 06:00 and 21:03, local time at Denver. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate DEN to SEA nonstop?** The schedule table on this page lists 17 flight numbers for DEN to SEA nonstops, including AS 317, AS 567, and AS 682 on Alaska Airlines; DL 1358, DL 1731, and DL 2740 on Delta Air Lines; and F9 1175 and F9 4545 on Frontier Airlines. The table lists each departure by date with its times and aircraft. **How do I check upgrade or award availability on DEN to SEA?** Open the DEN to SEA route on the interactive map or the matrix to see confirmed upgrade and award space by date on Alaska Airlines and Delta Air Lines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens. Flying the other way? See [SEA to DEN upgrade and award space](https://2lnr.com/routes/sea-den.md). Award seats rather than schedules? See [Alaska Airlines award availability](https://2lnr.com/awards/as.md) or [Delta Air Lines award availability](https://2lnr.com/awards/dl.md). Looking beyond this route? See [every route from Denver (DEN)](https://2lnr.com/routes/den.md), or [every route from Seattle (SEA)](https://2lnr.com/routes/sea.md). Nonstops to Seattle (SEA) from other airports within 150 miles of Denver (DEN): - [Eagle (EGE) to Seattle (SEA)](https://2lnr.com/routes/ege-sea.md), 119 miles from DEN - [Hayden (HDN) to Seattle (SEA)](https://2lnr.com/routes/hdn-sea.md), 141 miles from DEN Nonstops from Denver (DEN) to other airports within 150 miles of Seattle (SEA): - [Denver (DEN) to Vancouver (YVR)](https://2lnr.com/routes/den-yvr.md), 127 miles from SEA - [Denver (DEN) to Portland (PDX)](https://2lnr.com/routes/den-pdx.md), 129 miles from SEA Distances are great-circle between the airports, not driving distance. - [How Alaska upgrades clear](https://2lnr.com/about/as/upgrades.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## Never miss DEN to SEA upgrade or award space See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)