Missoula to Seattle (MSO-SEA): nonstop upgrade & award space

Alaska Airlines flies nonstop between Missoula (MSO) and Seattle (SEA), roughly 26 times a week. In the timetable below it flies as AS 354, AS 660, and AS 3333, scheduled at 1h 39m to 1h 43m for the 388 miles. 2LNR checks confirmed upgrade and award space on Alaska Airlines 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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26
Flights a week, 4-week average
1h 39m to 1h 43m
Scheduled flight time
388 mi
Nonstop distance
Free
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Missoula to Seattle flight schedule

Scheduled nonstop departures for MSO to SEA 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 Missoula (MSO) to Seattle (SEA)
Date Flight Airline Departs MSO Arrives SEA Duration Aircraft
AS 354Alaska Airlines, Inc.07:0307:461h 43mBoeing 737-900
AS 3333Alaska Airlines, Inc.14:0614:451h 39mEmbraer E175
AS 660Alaska Airlines, Inc.15:4916:291h 40mBoeing 737 MAX 9
AS 354Alaska Airlines, Inc.07:0307:461h 43mBoeing 737-900
AS 3333Alaska Airlines, Inc.14:0614:451h 39mEmbraer E175
AS 660Alaska Airlines, Inc.15:4916:291h 40mBoeing 737-900
AS 354Alaska Airlines, Inc.07:0307:461h 43mBoeing 737-900
AS 3333Alaska Airlines, Inc.14:0614:451h 39mEmbraer E175
AS 660Alaska Airlines, Inc.15:4916:291h 40mBoeing 737-900
AS 354Alaska Airlines, Inc.07:0307:461h 43mBoeing 737-900
AS 3333Alaska Airlines, Inc.14:0614:451h 39mEmbraer E175
AS 660Alaska Airlines, Inc.15:4916:291h 40mBoeing 737-800
AS 354Alaska Airlines, Inc.07:0307:461h 43mBoeing 737-900
AS 3333Alaska Airlines, Inc.14:0614:451h 39mEmbraer E175
AS 660Alaska Airlines, Inc.15:4916:291h 40mBoeing 737-900
AS 354Alaska Airlines, Inc.07:0307:461h 43mBoeing 737-900
AS 3333Alaska Airlines, Inc.14:0614:451h 39mEmbraer E175
AS 660Alaska Airlines, Inc.15:4916:291h 40mBoeing 737-900
AS 354Alaska Airlines, Inc.07:0307:461h 43mBoeing 737-800
AS 3333Alaska Airlines, Inc.14:0614:451h 39mEmbraer E175
AS 660Alaska Airlines, Inc.15:4916:291h 40mBoeing 737 MAX 8

Showing all 21 scheduled MSO to SEA 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 MSO to SEA date on the interactive map

Aircraft on the Missoula to Seattle nonstop

Alaska Airlines flies the departures in the schedule table on this page with the Boeing 737-900, the Embraer E175, the Boeing 737-800, the Boeing 737 MAX 9, and the Boeing 737 MAX 8. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

Confirmed upgrade & award space on MSO to SEA departures

2LNR tracks confirmed upgrade and award space on Alaska Airlines, segment by segment and date by date. Open the calendar for Missoula 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 12 of the 14 Missoula 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 MSO 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 MSO to SEA on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Missoula to Seattle nonstop

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

See MSO to SEA on the interactive map →

Frequently asked questions about MSO to SEA

How long is the flight from Missoula (MSO) to Seattle (SEA)?
Scheduled flight times from Missoula (MSO) to Seattle (SEA) run from 1h 39m to 1h 43m across the departures in the schedule table on this page. The nonstop covers about 388 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.
Which airlines fly nonstop from MSO to SEA?
Alaska Airlines is currently the only airline flying MSO to SEA nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines.
How many flights a week are there from MSO to SEA?
About 26 nonstop flights a week run between Missoula (MSO) and Seattle (SEA) in the current schedule, operated by Alaska Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from MSO to SEA depart?
Scheduled MSO to SEA nonstops in the next 7 days with service leave between 07:03 and 15:49, local time at Missoula. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Which flights operate MSO to SEA nonstop?
In the schedule table on this page, MSO to SEA nonstops fly as AS 354, AS 660, and AS 3333 on Alaska Airlines. The table lists each departure by date with its times and aircraft.
How do I check upgrade or award availability on MSO to SEA?
Open the MSO 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.

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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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