$63 Cheap Flights from Missoula (MSO) to Seattle (SEA)

View $63 flight on Tue, Apr 7, 2026Opens 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 $63 for one-way flights and $125 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Apr 7 - Tue, Apr 21
MSO
Missoula
SEA
Seattle
$125 Roundtrip, found 1 hour ago
$125
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Apr 7 from Missoula to Seattle, returning Tue, Apr 21, priced at $125 found 1 hour ago
Alaska Airlines
Tue, Apr 7 - Tue, Apr 21
MSO
Missoula
SEA
Seattle
$137 Roundtrip, found 1 hour ago
$137
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Tue, Apr 7 from Missoula to Seattle, returning Tue, Apr 21, priced at $137 found 1 hour ago
Alaska Airlines
Tue, Apr 7 - Tue, Apr 21
MSO
Missoula
SEA
Seattle
$151 Roundtrip, found 1 hour ago
$151
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Tue, Apr 7 from Missoula to Seattle, returning Tue, Apr 21, priced at $151 found 1 hour ago
Delta
Tue, Apr 7 - Tue, Apr 21
MSO
Missoula
SEA
Seattle
$155 Roundtrip, found 1 hour ago
$155
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Apr 7 from Missoula to Seattle, returning Tue, Apr 21, priced at $155 found 1 hour ago
Delta
Wed, Apr 15 - Sat, Apr 18
MSO
Missoula
SEA
Seattle
$157 Roundtrip, found 23 hours ago
$157
Roundtrip
found 23 hours ago
Select Delta flight, departing Wed, Apr 15 from Missoula to Seattle, returning Sat, Apr 18, priced at $157 found 23 hours ago
Alaska Airlines
Sat, Apr 18 - Sun, Apr 19
MSO
Missoula
SEA
Seattle
$157 Roundtrip, found 5 hours ago
$157
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Sat, Apr 18 from Missoula to Seattle, returning Sun, Apr 19, priced at $157 found 5 hours ago
Delta
Wed, Mar 25 - Sat, Mar 28
MSO
Missoula
SEA
Seattle
$167 Roundtrip, found 5 hours ago
$167
Roundtrip
found 5 hours ago
Select Delta flight, departing Wed, Mar 25 from Missoula to Seattle, returning Sat, Mar 28, priced at $167 found 5 hours ago
Alaska Airlines
Mon, Apr 13 - Sun, Apr 19
MSO
Missoula
SEA
Seattle
$177 Roundtrip, found 1 hour ago
$177
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Mon, Apr 13 from Missoula to Seattle, returning Sun, Apr 19, priced at $177 found 1 hour ago
United
Wed, Mar 11 - Wed, Mar 18
MSO
Missoula
SEA
Seattle
$485 Roundtrip, found 8 hours ago
$485
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Mar 11 from Missoula to Seattle, returning Wed, Mar 18, priced at $485 found 8 hours ago
American Airlines
Thu, May 28 - Fri, May 29
MSO
Missoula
SEA
Seattle
$554 Roundtrip, found 3 days ago
$554
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, May 28 from Missoula to Seattle, returning Fri, May 29, priced at $554 found 3 days ago

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From $117 - $297 per traveler.

Frequently asked questions

How much does a flight from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from $63 and cheap return flights from $125 Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) with Expedia. One-way flights generally range between $157 and $959, and roundtrip flights usually range from $247 to $1071. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The cheapest month to fly from MSO to SEA is April when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are 2 airlines offering direct flights from MSO to SEA:

  • Hawaiian Airlines operates around 21 direct flights from MSO to SEA every week
  • Qatar Airways operates around 7 direct flights from MSO to SEA every week

What is the cheapest airline that flies from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
American Airlines is one of the cheapest airlines offering connecting flights from Missoula (MSO) to Seattle (SEA), with round-trip tickets starting from around $272.37. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Missoula, MT (MSO) to Seattle, WA (SEA) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Alaska Airlines typically offers the lowest fares. Alaska Airlines offers the most daily flights from Missoula to Seattle, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
On average, there are around 1 nonstop flights per day from Missoula Intl. (MSO) to Seattle - Tacoma Intl. (SEA). For more options, look at flights that include layovers.
What is the earliest flight from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Missoula, MT (Missoula Intl.) to Seattle, WA (Seattle - Tacoma Intl.) typically leaves at around 5:00 AM, operated by Delta. This seasonal service is available in January, allowing you to maximize your time in Seattle. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Missoula (MSO) to Seattle (SEA) are in the early afternoon, from 12pm to 3pm. About 38% of passengers prefer this time window. Many travelers like this timing as it gives them the chance to enjoy a leisurely morning before their flight.
How long does it take to fly from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Flying nonstop from MSO to SEA takes around 1 hour 50 minutes, with the route covering approximately 387 miles. Flights with a layover typically take 6 hours longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
First class seats are offered on the MSO to SEA route. First class cabins are available on:

  • United Airlines
  • Delta Air Lines
  • American Airlines

How much is a business class flight from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A direct, return business class ticket from Missoula (MSO) to Seattle (SEA) typically costs between $488 - $863. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle from Missoula Intl. (MSO)?
If you're planning to travel to Seattle from Missoula Intl. (MSO), you can fly into Seattle - Tacoma Intl. (SEA) Some flights may connect through major hubs like Salt Lake City Intl. (SLC), Denver Intl. (DEN), San Francisco Intl. (SFO) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) Seattle Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals 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, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Missoula, MT (MSO-Missoula Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

0
Origin airport
Missoula Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$124
Distance
387 mi

Book with confidence

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 April. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $63 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.

 

Missoula to Seattle Flights

*Flight schedules are subject to change.

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*Available to One Key members.