Houston (IAH) to Seattle (SEA) flights: who flies it

Houston to Seattle flight schedule

Scheduled nonstop departures for IAH to SEA starting October 22, 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 Houston (IAH) to Seattle (SEA)
Date	Flight	Airline	Departs IAH	Arrives SEA	Duration	Aircraft
Thu, Oct 22	AS 241	Alaska Airlines, Inc.	06:02	08:46	4h 44m	Boeing 737-900
Thu, Oct 22	UA 2205	United Airlines	09:57	12:48	4h 51m	Boeing 737 MAX 9
Thu, Oct 22	UA 2228	United Airlines	12:05	14:53	4h 48m	Boeing 737 MAX 8
Thu, Oct 22	AS 439	Alaska Airlines, Inc.	14:55	17:42	4h 47m	Boeing 737 MAX 9
Thu, Oct 22	UA 2638	United Airlines	16:20	19:03	4h 43m	Boeing 737-800
Thu, Oct 22	UA 2341	United Airlines	20:09	23:00	4h 51m	Boeing 737 MAX 8
Fri, Oct 23	AS 241	Alaska Airlines, Inc.	06:02	08:46	4h 44m	Boeing 737 MAX 9
Fri, Oct 23	UA 2205	United Airlines	09:57	12:48	4h 51m	Boeing 737 MAX 9
Fri, Oct 23	UA 2228	United Airlines	12:05	14:53	4h 48m	Boeing 737 MAX 8
Fri, Oct 23	AS 439	Alaska Airlines, Inc.	14:55	17:42	4h 47m	Boeing 737 MAX 9
Fri, Oct 23	UA 2638	United Airlines	16:20	19:03	4h 43m	Boeing 737-800
Fri, Oct 23	UA 2341	United Airlines	20:09	23:00	4h 51m	Boeing 737 MAX 8
Sat, Oct 24	AS 241	Alaska Airlines, Inc.	06:02	08:46	4h 44m	Boeing 737 MAX 9
Sat, Oct 24	UA 2205	United Airlines	09:57	12:48	4h 51m	Boeing 737 MAX 9
Sat, Oct 24	UA 2228	United Airlines	12:04	14:52	4h 48m	Boeing 737 MAX 8
Sat, Oct 24	AS 439	Alaska Airlines, Inc.	14:55	17:42	4h 47m	Boeing 737 MAX 9
Sat, Oct 24	UA 2638	United Airlines	16:20	19:03	4h 43m	Boeing 737-800
Sat, Oct 24	UA 2341	United Airlines	20:06	22:57	4h 51m	Boeing 737 MAX 8
Sun, Oct 25	AS 241	Alaska Airlines, Inc.	06:02	08:46	4h 44m	Boeing 737-900
Sun, Oct 25	UA 1062	United Airlines	10:20	13:25	5h 5m	Boeing 737-800
Sun, Oct 25	AS 439	Alaska Airlines, Inc.	14:55	17:42	4h 47m	Boeing 737 MAX 9
Sun, Oct 25	UA 2638	United Airlines	16:25	19:17	4h 52m	Boeing 737-800
Sun, Oct 25	UA 2341	United Airlines	20:09	23:00	4h 51m	Boeing 737 MAX 8
Mon, Oct 26	AS 241	Alaska Airlines, Inc.	06:02	08:46	4h 44m	Boeing 737 MAX 9
Mon, Oct 26	UA 1062	United Airlines	10:20	13:25	5h 5m	Boeing 737-800
Mon, Oct 26	AS 439	Alaska Airlines, Inc.	14:55	17:42	4h 47m	Boeing 737-900
Mon, Oct 26	UA 2638	United Airlines	16:25	19:17	4h 52m	Boeing 737-800
Mon, Oct 26	UA 2341	United Airlines	19:55	22:51	4h 56m	Boeing 737-900
Tue, Oct 27	AS 241	Alaska Airlines, Inc.	06:02	08:46	4h 44m	Boeing 737 MAX 9
Tue, Oct 27	UA 1062	United Airlines	10:20	13:25	5h 5m	Boeing 737-800
Tue, Oct 27	AS 439	Alaska Airlines, Inc.	14:55	17:42	4h 47m	Boeing 737 MAX 9
Tue, Oct 27	UA 2638	United Airlines	16:25	19:17	4h 52m	Boeing 737-800
Tue, Oct 27	UA 2341	United Airlines	19:55	22:51	4h 56m	Boeing 737 MAX 9
Wed, Oct 28	AS 241	Alaska Airlines, Inc.	06:02	08:46	4h 44m	Boeing 737-900
Wed, Oct 28	UA 1062	United Airlines	10:20	13:25	5h 5m	Boeing 737-800
Wed, Oct 28	AS 439	Alaska Airlines, Inc.	14:55	17:42	4h 47m	Boeing 737 MAX 9
Wed, Oct 28	UA 2638	United Airlines	16:25	19:17	4h 52m	Boeing 737-800
Wed, Oct 28	UA 2341	United Airlines	20:09	23:00	4h 51m	Boeing 737 MAX 8

Showing all 38 scheduled IAH to SEA departures across 7 days with service, starting October 22, 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 IAH to SEA date on the interactive map

Aircraft on the Houston to Seattle nonstop

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

Confirmed upgrade & award space on IAH to SEA departures

2LNR tracks confirmed upgrade and award space on Alaska Airlines, segment by segment and date by date. Open the calendar for Houston to Seattle to see which departures have space, the next 14 days free on every product and the full horizon on Pro.

Alaska Airlines award space was open on 4 of the 14 Houston to Seattle departure dates from October 19 to November 1 that 2LNR checked in the 7 days to October 19, 2026.

See real availability

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

Airlines flying Houston to Seattle nonstop

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

See IAH to SEA on the interactive map →

Frequently asked questions about IAH to SEA

How long is the flight from Houston (IAH) to Seattle (SEA)?

Scheduled flight times from Houston (IAH) to Seattle (SEA) run from 4h 43m to 5h 5m across the departures in the schedule table on this page. The nonstop covers about 1,873 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.

Which airlines fly nonstop from IAH to SEA?

United Airlines and Alaska Airlines fly IAH to SEA nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines.

How many flights a week are there from IAH to SEA?

About 36 nonstop flights a week run between Houston (IAH) and Seattle (SEA) in the current schedule, operated by United Airlines and Alaska Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.

What time do flights from IAH to SEA depart?

Scheduled IAH to SEA nonstops in the next 7 days with service leave between 06:02 and 20:09, local time at Houston. The schedule table on this page lists every departure by date, with its arrival time and aircraft.

Which flights operate IAH to SEA nonstop?

In the schedule table on this page, IAH to SEA nonstops fly as UA 1062, UA 2205, UA 2228, UA 2341, and UA 2638 on United Airlines, and AS 241 and AS 439 on Alaska Airlines. The table lists each departure by date with its times and aircraft.

How do I check upgrade or award availability on IAH to SEA?

Open the IAH to SEA route on the interactive map or the matrix to see confirmed upgrade and award space by date on Alaska Airlines, 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.