$143 Cheap Flights from San Diego (SAN) to Missoula (MSO)

View $143 flight on Fri, Dec 5, 2025Opens in a new window

Popular airlines from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO)

Cheap Flights from San Diego to Missoula (SAN-MSO)

Prices were available within the past 7 days and start at $143 for one-way flights and $261 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Nov 25 - Thu, Dec 4
SAN
San Diego
MSO
Missoula
$261 Roundtrip, found 7 hours ago
$261
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Nov 25 from San Diego to Missoula, returning Thu, Dec 4, priced at $261 found 7 hours ago
Delta
Mon, Jan 12 - Wed, Jan 21
SAN
San Diego
MSO
Missoula
$266 Roundtrip, found 5 days ago
$266
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Jan 12 from San Diego to Missoula, returning Wed, Jan 21, priced at $266 found 5 days ago
Frontier Airlines
Thu, Nov 20 - Mon, Dec 1
SAN
San Diego
MSO
Missoula
$270 Roundtrip, found 22 hours ago
$270
Roundtrip
found 22 hours ago
Select Frontier Airlines flight, departing Thu, Nov 20 from San Diego to Missoula, returning Mon, Dec 1, priced at $270 found 22 hours ago
Delta
Mon, Nov 17 - Sat, Dec 6
SAN
San Diego
MSO
Missoula
$277 Roundtrip, found 4 days ago
$277
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Nov 17 from San Diego to Missoula, returning Sat, Dec 6, priced at $277 found 4 days ago
Delta
Wed, Jan 14 - Tue, Jan 27
SAN
San Diego
MSO
Missoula
$280 Roundtrip, found 1 day ago
$280
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jan 14 from San Diego to Missoula, returning Tue, Jan 27, priced at $280 found 1 day ago
Hawaiian Airlines
Wed, Jan 7 - Sat, Jan 10
SAN
San Diego
MSO
Missoula
$281 Roundtrip, found 5 days ago
$281
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Wed, Jan 7 from San Diego to Missoula, returning Sat, Jan 10, priced at $281 found 5 days ago
Bargain Flight
Fri, Jan 9 - Sat, Jan 17
SAN
San Diego
MSO
Missoula
$282 Roundtrip, found 5 days ago
$282
Roundtrip
found 5 days ago
Select Bargain Flight flight, departing Fri, Jan 9 from San Diego to Missoula, returning Sat, Jan 17, priced at $282 found 5 days ago
Delta
Thu, Nov 27 - Thu, Dec 4
SAN
San Diego
MSO
Missoula
$284 Roundtrip, found 8 hours ago
$284
Roundtrip
found 8 hours ago
Select Delta flight, departing Thu, Nov 27 from San Diego to Missoula, returning Thu, Dec 4, priced at $284 found 8 hours ago
Alaska Airlines
Sat, Aug 15 - Sat, Aug 22
SAN
San Diego
MSO
Missoula
$287 Roundtrip, found 2 days ago
$287
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Aug 15 from San Diego to Missoula, returning Sat, Aug 22, priced at $287 found 2 days ago
Delta
Sun, Feb 1 - Tue, Feb 10
SAN
San Diego
MSO
Missoula
$289 Roundtrip, found 1 day ago
$289
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Feb 1 from San Diego to Missoula, returning Tue, Feb 10, priced at $289 found 1 day ago

Find the cheapest month to fly from San Diego (SAN) to Missoula (MSO)

January is typically the cheapest month to fly

From $236 - $486 per traveler.

Alternative airports near Missoula

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

Select flight to Missoula Intl. MSO. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $351
MSO
Missoula Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $351
Flights from San Diego (SAN) to Missoula (MSO)
Origin airport
San Diego Intl.
Destination airport
Missoula Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$260
Distance
993 mi

San Diego to Missoula Flights

The cheapest times to fly from San Diego to Missoula

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 San Diego to Missoula are during the month of November. You can find some of the cheapest flights from San Diego to Missoula with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Diego to Missoula

Sunday is one of the best days to book for cheap flights from San Diego to Missoula: 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 San Diego to Missoula

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 San Diego to Missoula in 2025. You can also book with separate airlines for your outbound and return journeys, from $143 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 San Diego to Missoula 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 San Diego to Missoula 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 San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO) cost?
Get a cheap one-way flight from $143 or cheap return flight from $261 from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO)?
The cheapest month to fly from SAN to MSO is November, when demand is low. Off-peak months are often when airlines offer better prices between these airports.
What is the cheapest airline that flies from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SAN to MSO flight.
How many flights per day from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO)?
There aren't any daily nonstop flights departing from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from SAN to MSO?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can vary based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What airline has the least delays from SAN to MSO?
Consider traveling with Alaska Airlines if you'd like to fly straight from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO) without any interruptions. This airline has the strongest track record for punctuality, with an on-time score of 88%. Want to be notified if anything changes? You can check your flight status using the Expedia App.
What is the best time to fly from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO)?
To avoid possible delays on the San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO) route, aim to travel before 3 PM. Flights after this time are 22% more likely to be canceled.**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.
Is it cheaper to buy a plane ticket from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO) last-minute?
Waiting until right before your break to book your flight from SAN to MSO generally means paying more. While you may come across some last-minute discounts, there's no guarantee. Be flexible with your travel plans for the best chance of snagging a bargain.
Is it cheaper to book a SAN to MSO flight and hotel package?
You'll typically save money by securing a SAN to MSO flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. Once you've selected your preferred accommodations and flights, consider other add-ons like car rentals, tours and activities.
Can I cancel or change the date of my flight from San Diego Intl. Airport (SAN) to Missoula Intl. Airport (MSO)?
If you reserved your SAN to MSO 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 purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

Explore a world of travel with Expedia

*Available to One Key members.