$88 Cheap Flights from Missoula (MSO) to Seattle (SEA)

View $88 flight on Tue, Oct 28, 2025Opens in a new window

Popular airlines from Missoula Intl. Airport (MSO) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Missoula to Seattle (MSO-SEA)

Prices were available within the past 7 days and start at $88 for one-way flights and $157 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Tue, Sep 30 - Sat, Oct 11
MSO
Missoula
SEA
Seattle
$157 Roundtrip, just found
$157
Roundtrip
just found
Select Hawaiian Airlines flight, departing Tue, Sep 30 from Missoula to Seattle, returning Sat, Oct 11, priced at $157 just found
Hawaiian Airlines
Sat, Oct 25 - Tue, Nov 4
MSO
Missoula
SEA
Seattle
$167 Roundtrip, found 3 days ago
$167
Roundtrip
found 3 days ago
Select Hawaiian Airlines flight, departing Sat, Oct 25 from Missoula to Seattle, returning Tue, Nov 4, priced at $167 found 3 days ago
Delta
Wed, Oct 8 - Tue, Oct 14
MSO
Missoula
SEA
Seattle
$177 Roundtrip, found 3 hours ago
$177
Roundtrip
found 3 hours ago
Select Delta flight, departing Wed, Oct 8 from Missoula to Seattle, returning Tue, Oct 14, priced at $177 found 3 hours ago
Hawaiian Airlines
Wed, Oct 1 - Sat, Oct 11
MSO
Missoula
SEA
Seattle
$177 Roundtrip, just found
$177
Roundtrip
just found
Select Hawaiian Airlines flight, departing Wed, Oct 1 from Missoula to Seattle, returning Sat, Oct 11, priced at $177 just found
Delta
Sat, Oct 18 - Tue, Oct 21
MSO
Missoula
SEA
Seattle
$188 Roundtrip, found 1 day ago
$188
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Oct 18 from Missoula to Seattle, returning Tue, Oct 21, priced at $188 found 1 day ago
Delta
Tue, Sep 23 - Sat, Sep 27
MSO
Missoula
SEA
Seattle
$190 Roundtrip, found 7 hours ago
$190
Roundtrip
found 7 hours ago
Select Delta flight, departing Tue, Sep 23 from Missoula to Seattle, returning Sat, Sep 27, priced at $190 found 7 hours ago
Frontier Airlines
Fri, Oct 24 - Tue, Oct 28
MSO
Missoula
SEA
Seattle
$192 Roundtrip, found 4 days ago
$192
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Oct 24 from Missoula to Seattle, returning Tue, Oct 28, priced at $192 found 4 days ago
Alaska Airlines
Sat, Nov 8 - Tue, Nov 11
MSO
Missoula
SEA
Seattle
$196 Roundtrip, found 2 hours ago
$196
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Sat, Nov 8 from Missoula to Seattle, returning Tue, Nov 11, priced at $196 found 2 hours ago
Hawaiian Airlines
Wed, Oct 1 - Mon, Oct 13
MSO
Missoula
SEA
Seattle
$197 Roundtrip, just found
$197
Roundtrip
just found
Select Hawaiian Airlines flight, departing Wed, Oct 1 from Missoula to Seattle, returning Mon, Oct 13, priced at $197 just found
United
Fri, Oct 3 - Sat, Oct 4
MSO
Missoula
SEA
Seattle
$541 Roundtrip, found 3 hours ago
$541
Roundtrip
found 3 hours ago
Select United flight, departing Fri, Oct 3 from Missoula to Seattle, returning Sat, Oct 4, priced at $541 found 3 hours ago

Find the cheapest month to fly from Missoula (MSO) to Seattle (SEA)

February is typically the cheapest month to fly

From $136 - $298 per traveler.

Graph displaying average flight prices per month

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $288
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $288
0
Flights from Missoula (MSO) to Seattle (SEA)
Origin airport
Missoula Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$156
Distance
387 mi

Missoula to Seattle Flights

The cheapest times to fly from Missoula to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Missoula to Seattle are during the month of September. You can find some of the cheapest flights from Missoula to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Missoula to Seattle

Sunday is one of the best days to book for cheap flights from Missoula to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Missoula to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Missoula to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $88 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Missoula to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Missoula to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA) cost?
Grab a cheap one-way flight from $88 or cheap return flight from $157 from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA)?
September is the most affordable month to fly from MSO to SEA. Traveling during quieter months is often the key to landing a great deal.
Which airlines fly direct from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA)?
If you're departing from Missoula Intl. Airport (MSO), you can take a nonstop flight to Seattle - Tacoma Intl. Airport (SEA) with Alaska Airlines.
What is the cheapest airline that flies from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline flying from MSO to SEA, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA)?
Daily, an average of 2 direct flights operate from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA). Select the departure date that best fits your schedule.
What are the most popular departure times for flights from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA)?
More people fly between MSO and SEA at 6 PM than at any other point in the day. Looking for a quieter experience? Travel outside of rush hours and you could save on your fare as well.
What day of the week has the most flights from MSO to SEA?
If you fly on a Friday, you'll get the greatest range of options for flights from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA).
What is the earliest flight from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA)?
The first flight of the day jetting off from Missoula Intl. Airport (MSO) is at around 6:30AM UTC-7. Catch this flight and you'll touch down at Seattle - Tacoma Intl. Airport (SEA) at approximately 7:10AM UTC-8. The entire trip takes 1h 40m.
How long does it take to fly from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA)?
Flights from MSO to SEA have an average travel time of 1 hour and 37 minutes. The total distance between these two airports is 390 mi.
What is the best time to fly from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA)?
To reach Seattle - Tacoma Intl. Airport (SEA) on schedule, opt for a flight that leaves Missoula Intl. Airport (MSO) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Seattle from Missoula Intl. Airport (MSO)?
If you've booked a direct flight from Missoula Intl. Airport (MSO) to Seattle, Seattle - Tacoma Intl. Airport (SEA) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Booking your ticket from MSO to SEA right before your getaway is generally more expensive. But if there's some wiggle room with your itinerary, you could bag a cheap last-minute fare.
Is it cheaper to book a MSO to SEA flight and hotel package?
Opting for a MSO to SEA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our impressive range of accommodations and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Missoula Intl. Airport (MSO) to Seattle - Tacoma Intl. Airport (SEA)?
You can usually reschedule or cancel your MSO to SEA flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.