$130 Cheap Flights from Missoula (MSO) to San Diego (SAN)

View $130 flight on Fri, Jul 18, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $130 for one-way flights and $236 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Jan 8 - Mon, Jan 12
MSO
Missoula
SAN
San Diego
$236 Roundtrip, found 4 days ago
$236
Roundtrip
found 4 days ago
Select United flight, departing Thu, Jan 8 from Missoula to San Diego, returning Mon, Jan 12, priced at $236 found 4 days ago
Delta
Wed, Dec 31 - Sun, Jan 18
MSO
Missoula
SAN
San Diego
$246 Roundtrip, found 1 day ago
$246
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Dec 31 from Missoula to San Diego, returning Sun, Jan 18, priced at $246 found 1 day ago
American Airlines
Wed, Jul 30 - Tue, Aug 5
MSO
Missoula
CLD
Carlsbad
$251 Roundtrip, found 4 days ago
$251
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Jul 30 from Missoula to Carlsbad, returning Tue, Aug 5, priced at $251 found 4 days ago
United
Sat, May 30 - Mon, Jun 1
MSO
Missoula
SAN
San Diego
$259 Roundtrip, found 3 days ago
$259
Roundtrip
found 3 days ago
Select United flight, departing Sat, May 30 from Missoula to San Diego, returning Mon, Jun 1, priced at $259 found 3 days ago
United
Wed, Jan 7 - Sun, Jan 11
MSO
Missoula
SAN
San Diego
$261 Roundtrip, found 4 days ago
$261
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jan 7 from Missoula to San Diego, returning Sun, Jan 11, priced at $261 found 4 days ago
United
Fri, Sep 26 - Mon, Sep 29
MSO
Missoula
SAN
San Diego
$265 Roundtrip, found 22 hours ago
$265
Roundtrip
found 22 hours ago
Select United flight, departing Fri, Sep 26 from Missoula to San Diego, returning Mon, Sep 29, priced at $265 found 22 hours ago
United
Fri, Aug 29 - Sun, Aug 31
MSO
Missoula
SAN
San Diego
$266 Roundtrip, found 3 days ago
$266
Roundtrip
found 3 days ago
Select United flight, departing Fri, Aug 29 from Missoula to San Diego, returning Sun, Aug 31, priced at $266 found 3 days ago
Hawaiian Airlines
Sat, Aug 2 - Sat, Aug 16
MSO
Missoula
SAN
San Diego
$267 Roundtrip, found 6 days ago
$267
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Sat, Aug 2 from Missoula to San Diego, returning Sat, Aug 16, priced at $267 found 6 days ago
Delta
Wed, Jan 21 - Fri, Feb 6
MSO
Missoula
SAN
San Diego
$269 Roundtrip, found 1 day ago
$269
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jan 21 from Missoula to San Diego, returning Fri, Feb 6, priced at $269 found 1 day ago
Alaska Airlines
Sat, Aug 9 - Wed, Aug 13
MSO
Missoula
SAN
San Diego
$275 Roundtrip, found 3 hours ago
$275
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Sat, Aug 9 from Missoula to San Diego, returning Wed, Aug 13, priced at $275 found 3 hours ago

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

November is typically the cheapest month to fly

From $158 - $587 per traveler.

Graph displaying average flight prices per month

Flights from Missoula (MSO) to San Diego (SAN)
Origin airport
Missoula Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, United
Roundtrip price
$235
Distance
993 mi

Missoula to San Diego Flights

The cheapest times to fly from Missoula to San Diego

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

 

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

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

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 San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from $130 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 San Diego 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 San Diego 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 San Diego Intl. Airport (SAN) cost?
Snag cheap return fares starting from $297 from Missoula Intl. Airport (MSO) to San Diego Intl. Airport (SAN). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving MSO on July 19 2025 and touching down at SAN. The price was last updated on July 10 2025 and has not changed since.
What is the cheapest month to fly from MSO to SAN?
Catch a direct flight from MSO to SAN in August to enjoy cheaper tickets. You can find a one-way Alaska Airlines flight for $154 leaving on August 16 2025. This price is based on the cheapest direct flight found on Expedia for this route in the next 330 days. The price was last updated on July 10 2025 and remains unchanged.
What is the cheapest airline that flies from MSO to SAN?
Book a flight from MSO to SAN with Alaska Airlines. This carrier currently has the cheapest one-way ticket for this route, starting from $154. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from MSO on August 16 2025. Prices were last updated on July 10 2025 and have not changed since.
How many flights per day from Missoula Intl. Airport (MSO) to San Diego Intl. Airport (SAN)?
Nonstop flights from Missoula Intl. Airport (MSO) to San Diego Intl. Airport (SAN) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from MSO to SAN?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on a number of factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What airline has the least delays from MSO to SAN?
With 84% of journeys typically arriving as scheduled, Alaska Airlines has the best on-time performance for direct flights from Missoula Intl. Airport (MSO) to San Diego Intl. Airport (SAN). To check your flight status and get notifications about any changes, head to the Expedia App.
What is the best time to fly from Missoula Intl. Airport (MSO) to San Diego Intl. Airport (SAN)?
To avoid possible delays on the Missoula Intl. Airport (MSO) to San Diego Intl. Airport (SAN) route, fly before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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 Missoula Intl. Airport (MSO) to San Diego Intl. Airport (SAN) last-minute?
Last-minute fares from MSO to SAN are typically more expensive. To lock in the lowest prices, start searching for flights well ahead of time. That said, if your travel plans are flexible, you may score a cheap ticket right before you leave.
Is it cheaper to book a MSO to SAN flight and hotel package?
Compared with arranging hotels and flights separately, booking a MSO to SAN flight and hotel package with Expedia could lead to significant savings. What's more, having it all in one place takes the hassle out of travel planning. Just pick your flights and choose from our wide range of hotels, then tailor your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Missoula Intl. Airport (MSO) to San Diego Intl. Airport (SAN)?
It's generally possible to cancel or reschedule your MSO to SAN flight. However, if it's been more than 24 hours since booking, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.