Cheap flights from Missoula to San Diego

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Flight deals from Missoula to San Diego

Looking for a cheap last-minute deal or the best round-trip flight from Missoula to San Diego? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Missoula to San Diego

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Missoula to San Diego flights are currently cheapest in April.

Direct flights from Missoula to San Diego

Alternative Missoula to San Diego routes

Looking for the cheapest, fastest or easiest route from Missoula to San Diego? You could fly into the following airports instead.

Missoula to San Diego: Flight information

The things to know before you go.
Cheapest flight found$260
Cheapest month to flyApril
Average flight time2 hrs, 52 mins
Most popular airlineHorizon Air
Average flights per week8

Finding cheap flights from Missoula to San Diego: Frequently asked questions

There are 2 airports in San Diego: San Diego International and McClellan – Palomar.
The best price we found for a round-trip flight from Missoula to San Diego is $260. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 52 minutes is the average flight time from Missoula to San Diego.
Horizon Air, Alaska Airlines and American Airlines fly direct from Missoula to San Diego.
There are 16 flights per week flying from Missoula to San Diego, as of February 2026.
The cheapest month to fly from Missoula to San Diego is usually April.
If you're flying from Missoula Airport, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the center of San Diego. We've found flights to this airport from $260.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Missoula Airport to San Diego on Friday, April 17, 2026.
Yes – the average flight time is 2 hours and 52 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Diego but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to San Diego is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around 13°C. August is typically the warmest month in San Diego, when it usually averages around 28°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 10°C. The rainiest month is February.
Currently, United offers the cheapest flight tickets to San Diego.

Traveling from Missoula International Airport (MSO) to San Diego: what you need to know

  • The average length of a direct flight from Missoula International Airport to San Diego is 2 hours 45 minutes.

  • San Diego is one hour behind Missoula, where Missoula International Airport is located. San Diego runs on the UTC-7 timezone.

  • To avoid rushing for your MSO to San Diego flight, leave plenty of time to check in and drop off your luggage. Arriving two hours before international departures and one hour before domestic flights is the standard rule.

  • If you're jetting off during a major holiday or another peak period, allow extra time. A good general rule is two hours before domestic flights and up to four hours before international departures. Lines at check-in and security will be longer.

  • Direct Missoula International Airport to San Diego tickets are available for booking. San Diego International Airport (SAN) will be your arrival point.

  • Alaska Airlines is a well-known carrier that operates direct flights from Missoula International Airport to San Diego.

  • Located around 8 kilometers from the center of Missoula, MSO can be reached in about 10 minutes by car. Traveling on public transport takes roughly 35 minutes.

  • Want an easy start to your vacation? Stay near MSO. Whether you're boarding an early flight from Missoula International Airport to San Diego or want to avoid feeling rushed, these hotels have you covered:

  • Missoula International Airport gets top marks for its on-time performance. 82.29% of flights that depart MSO arrive at their destination without delay.

  • You'll find MSO at 5225 Highway 10 West.

How to find the cheapest flights from Missoula International Airport (MSO) to San Diego

  • $120 is the lowest price we've seen for a one-way Missoula International Airport to San Diego flight. A return ticket right now is $260. Depending on when and how early you book, these fares can change.

  • Lock in cheap flights from MSO to San Diego by booking one month ahead. According to our research, that's the sweet spot for bagging a bargain.

  • The best month for finding cheap Missoula International Airport to San Diego tickets is May. Use the 'Whole month' tool to compare all available prices, then select the dates that offer the biggest savings.

  • You don't need to keep checking in to find out if fares have dropped when you create a Price Alert. We'll let you know as soon as there's an even bigger deal on cheap flights from MSO to San Diego.

  • Pick your preferred departure and arrival times, airlines and number of stops with our filters. Then, sort the results for your flight from Missoula International Airport to San Diego by 'Best,' 'Fastest' or 'Cheapest.'

Airports in San Diego

San Diego International Airport (SAN)

  • San Diego International Airport (SAN) to central San Diego takes around 10 minutes by car. The center is roughly 5 kilometers away.

  • Traveling to the center by public transport will take you around 20 minutes.

  • The last thing you want is a long journey to your hotel if you're arriving on a late flight from Missoula International Airport to San Diego. Stay at one of these accommodation options near SAN instead:

  • Grab a San Diego International Airport rental car and discover San Diego and beyond with your own wheels. Thrifty, Dollar and Budget are top providers you can book with here.

  • Booking your vehicle from San Diego International Airport around two weeks in advance of your flight from MSO to San Diego can help you lock in the lowest rate.

  • SAN is located at N Harbor Dr.

McClellan-Palomar Airport (CLD)

  • McClellan-Palomar Airport (CLD) is around 56 kilometers from central San Diego. Once you've disembarked your flight from Missoula International Airport to San Diego, it'll take you around 40 minutes to reach the heart of the city in a ride-share or cab.

  • Public transport will get you there in about 2 hours 15 minutes.

  • You'll find some great places to rest your head close to CLD. Unwind and get cozy after your MSO to San Diego flight at one of these well-located options:

  • Forget about inconvenient public transport schedules or cab lines. Grab a McClellan-Palomar Airport rental car and take your journey in whatever direction you like. Check out the availability and rates from Budget, Hertz and Avis.

  • Avoid the long lines and paperwork at the rental desk by completing your booking beforehand. Secure your ride from CLD ahead of time so you can simply grab the keys and be on your way.

Best time to go to San Diego

  • Visit San Diego in high season if you like a busy atmosphere, but remember that hotel prices are typically higher. Alternatively, book your flights from Missoula International Airport to San Diego in the low season when prices are cheaper and it's less crowded.

  • The warmest month in San Diego is August, with temperatures ranging between 17ºC (63ºF) and 28ºC (82ºF). Lock in your Missoula International Airport to San Diego flight ticket then if that's your ideal forecast.

  • Search for cheap tickets from MSO to San Diego in February if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between 7ºC (45ºF) and 23ºC (73ºF) on average.

More about San Diego

Explore more of United States

  • Los Angeles is just one of the many places in United States waiting to be discovered once you've seen San Diego. Around 177 kilometers away to the north-west, top sights here include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Around 483 kilometers east of San Diego, Phoenix is another essential stop in United States. Experience this destination's highlights firsthand at Desert Botanical Garden, Heard Museum and Papago Park.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.