Seattle to Washington (SEA-IAD): nonstop upgrade & award space

United Airlines, Alaska Airlines, and Delta Air Lines fly nonstop between Seattle (SEA) and Washington (IAD), roughly 35 times a week. The timetable below shows the nonstop scheduled at 4h 59m to 5h 15m for the 2,300 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 . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

Updated .

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35
Flights a week, 4-week average
4h 59m to 5h 15m
Scheduled flight time
2,300 mi
Nonstop distance
Free
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Seattle to Washington flight schedule

Scheduled nonstop departures for SEA to IAD starting October 23, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Seattle (SEA) to Washington (IAD)
Date Flight Airline Departs SEA Arrives IAD Duration Aircraft
AS 737Alaska Airlines, Inc.08:1516:305h 15mBoeing 737 MAX 9
UA 1523United Airlines08:2516:315h 6mBoeing 737 MAX 9
DL 541Delta Air Lines14:5022:494h 59mAirbus A220-300
AS 366Alaska Airlines, Inc.15:5623:595h 3mBoeing 737-900
AS 367Alaska Airlines, Inc.21:3605:405h 4mBoeing 737 MAX 9
UA 2693United Airlines23:1407:175h 3mBoeing 737 MAX 9
AS 737Alaska Airlines, Inc.08:1516:305h 15mBoeing 737-900
UA 1523United Airlines08:2516:315h 6mBoeing 737 MAX 9
DL 541Delta Air Lines11:5820:065h 8mAirbus A220-300
AS 366Alaska Airlines, Inc.15:5623:595h 3mBoeing 737 MAX 9
AS 367Alaska Airlines, Inc.21:3305:405h 7m737
UA 2693United Airlines23:1407:175h 3mBoeing 737 MAX 9
AS 737Alaska Airlines, Inc.08:1516:305h 15mBoeing 737 MAX 9
DL 541Delta Air Lines14:5022:494h 59mAirbus A220-300
AS 366Alaska Airlines, Inc.15:5623:595h 3mBoeing 737 MAX 9
AS 367Alaska Airlines, Inc.21:3605:405h 4mBoeing 737-900
UA 672United Airlines08:0916:084h 59mBoeing 737 MAX 8
AS 737Alaska Airlines, Inc.08:1516:305h 15mBoeing 737 MAX 9
DL 541Delta Air Lines14:5022:494h 59mAirbus A220-300
AS 366Alaska Airlines, Inc.15:5623:595h 3mBoeing 737 MAX 9
AS 367Alaska Airlines, Inc.21:3605:405h 4mBoeing 737 MAX 9
UA 672United Airlines08:0916:084h 59mBoeing 737 MAX 8
AS 737Alaska Airlines, Inc.08:1516:305h 15mBoeing 737-900
DL 541Delta Air Lines14:5022:494h 59mAirbus A220-300
AS 366Alaska Airlines, Inc.15:5623:595h 3mBoeing 737 MAX 9
AS 367Alaska Airlines, Inc.21:3305:405h 7m737
UA 672United Airlines08:0916:084h 59mBoeing 737 MAX 8
AS 737Alaska Airlines, Inc.08:1516:305h 15mBoeing 737-800
DL 541Delta Air Lines14:5022:494h 59mAirbus A220-300
AS 366Alaska Airlines, Inc.15:5623:595h 3mBoeing 737 MAX 9
AS 367Alaska Airlines, Inc.21:3305:405h 7m737
UA 672United Airlines08:0916:084h 59mBoeing 737 MAX 8
AS 737Alaska Airlines, Inc.08:1516:305h 15mBoeing 737 MAX 9
DL 541Delta Air Lines14:5022:494h 59mAirbus A220-300
AS 366Alaska Airlines, Inc.15:5623:595h 3mBoeing 737 MAX 9
AS 367Alaska Airlines, Inc.21:3605:405h 4mBoeing 737-900

Showing all 36 scheduled SEA to IAD departures across 7 days with service, starting October 23, 2026. Later dates are 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 SEA to IAD date on the interactive map

Aircraft on the Seattle to Washington nonstop

In the schedule table on this page, Alaska Airlines flies the Boeing 737 MAX 9, the Boeing 737-900, the Boeing 737, and the Boeing 737-800. United Airlines flies the Boeing 737 MAX 9 and the Boeing 737 MAX 8. Delta Air Lines flies the Airbus A220-300. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

Confirmed upgrade & award space on SEA to IAD 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 Seattle to Washington 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 Seattle to Washington departures from October 19 to November 1. Alaska Airlines had space open on 8 of 14 dates checked and Delta Air Lines on 13 of 14.

See real availability

Confirmed upgrade or award seats by date on the SEA to IAD 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 SEA to IAD on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Seattle to Washington nonstop

Carriers operating SEA to IAD nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date.

See SEA to IAD on the interactive map →

Frequently asked questions about SEA to IAD

How long is the flight from Seattle (SEA) to Washington (IAD)?
Scheduled flight times from Seattle (SEA) to Washington (IAD) run from 4h 59m to 5h 15m across the departures in the schedule table on this page. The nonstop covers about 2,300 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.
Which airlines fly nonstop from SEA to IAD?
United Airlines, Alaska Airlines, and Delta Air Lines fly SEA to IAD nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines.
How many flights a week are there from SEA to IAD?
About 35 nonstop flights a week run between Seattle (SEA) and Washington (IAD) in the current schedule, operated by United Airlines, Alaska Airlines, and Delta Air Lines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from SEA to IAD depart?
Scheduled SEA to IAD nonstops in the next 7 days with service leave between 08:09 and 23:14, local time at Seattle. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Which flights operate SEA to IAD nonstop?
In the schedule table on this page, SEA to IAD nonstops fly as AS 366, AS 367, and AS 737 on Alaska Airlines; UA 672, UA 1523, and UA 2693 on United Airlines; and DL 541 on Delta Air Lines. The table lists each departure by date with its times and aircraft.
How do I check upgrade or award availability on SEA to IAD?
Open the SEA to IAD 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.

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See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro.

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