Cheap flights from Billings to San Diego

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      Compare Billings to San Diego flight deals

      Find the cheapest month or even day of the year to fly to San Diego

      Book the best San Diego fare with no extra fees

      Flight deals from Billings to San Diego

      Looking for a cheap last-minute deal or the best round-trip flight from Billings Airport to San Diego? If you want to travel next month, round-trip fares start from $372. Find the lowest prices on one-way and round-trip tickets right here.
      How did we find these deals? The deals you see here are the lowest prices for flight tickets from Billings to San Diego found in the last 4 days, and are subject to change and availability.

      Find the cheapest month to fly from Billings to San Diego

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

      Alternative Billings to San Diego routes

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

      Billings to San Diego: Flight information

      The things to know before you go.
      Cheapest flight found$372
      Cheapest month to flyOctober

      Finding cheap flights from Billings 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 Billings to San Diego is $374. 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.
      Currently, there are no airlines that fly direct from Billings to San Diego. But we found flights with one or more stops from $372.
      There are no flights flying from Billings to San Diego, as of September 2026.
      The cheapest month to fly from Billings to San Diego is usually October.
      If you're flying from Billings 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 $374.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Billings Airport to San Diego on Friday, October 2, 2026.
      No airlines currently offer direct flights between Billings Airport and San Diego. Most routes have one or more stops.
      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 September, the average temperature is usually around 21°C. September is typically the warmest month in San Diego, when it usually averages around 24°C. You can expect the least rain in July. The coldest month is March, with temperatures averaging 12°C. The rainiest month is March.
      Currently, Allegiant Air offers the cheapest flight tickets to San Diego.

      Traveling from Billings Logan International Airport (BIL) to San Diego: what you need to know

      • San Diego is one hour behind Billings, where Billings Logan International Airport is located. San Diego follows the UTC-8 timezone.

      • To avoid missing your BIL to San Diego flight, leave plenty of time for things like baggage drop and finding your gate. Turning up two hours before international departures and one hour before domestic flights is the standard rule.

      • Flying during a popular month like June? Public holidays and other popular periods can lead to longer lines and delays at security. Play it safe and arrive up to four hours before an international flight and two hours before a domestic departure.

      • Located around 3 kilometers from central Billings, BIL can be reached in about 15 minutes by car. Traveling on public transport will take roughly 30 minutes.

      • Want a hassle-free start to your vacation? Stay near BIL. Whether you've booked an early flight from Billings Logan International Airport to San Diego or don't want departure day to feel hectic, these hotels put convenience first:

      • Billings Logan International Airport maintains a strong on-time performance, making delays less likely. Departures from BIL arrive on schedule 84% of the time.

      • BIL is located at 1901 Terminal Circle, Room 216.

      How to find the cheapest flights from Billings Logan International Airport (BIL) to San Diego

      • $128 is currently the best price for a one-way Billings Logan International Airport to San Diego flight. Return plane tickets start at $372. These fares can change based on availability.

      • Don't leave everything to the last moment. You're more likely to find cheap flights from BIL to San Diego if you book early. Airlines often have some amazing early bird deals.

      • Finding cheap tickets from Billings Logan International Airport to San Diego is more likely if you can be flexible with your travel plans. Use the 'Whole month' function to get the lowest prices across each month and score an epic deal.

      • Save time looking for cheap flights from BIL to San Diego by setting up a Price Alert. You'll get an email or notification through the app when fares go down.

      • Find an affordable flight from Billings Logan International Airport to San Diego with the help of our filters. Choose your preferred duration, number of stops and airlines, then sort the results by 'Cheapest' to see the best deals.

      Airports in San Diego

      San Diego International Airport (SAN)

      • The distance from San Diego International Airport (SAN) to central San Diego is roughly 5 kilometers. It takes around 15 minutes to get to the center driving.

      • If you're taking public transport, expect a journey time of around 25 minutes.

      • If you're arriving on a late flight from Billings Logan International Airport to San Diego, few things beat the convenience of staying near the terminal. Collect your bags from the carousel and then be showered and sleeping soon after at one of these hotels near SAN:

      • Lock in the best deal by booking your ride from San Diego International Airport about two weeks ahead of your flight from BIL to San Diego.

      • The address for SAN is N Harbor Dr.

      McClellan-Palomar Airport (CLD)

      • Central San Diego is roughly 48 kilometers from McClellan-Palomar Airport (CLD). Disembark your flight from Billings Logan International Airport to San Diego and then keep your eyes peeled for any airport signs directing you to the center.

      • Hang the 'Do not disturb' sign on your door and rest at a hotel near CLD. Here are a few options where you can settle in after your BIL to San Diego flight:

      • In general, the sooner you book, the better the prices and selection of vehicles. Lock in your ride from CLD as soon as your plans are confirmed.

      Best time to go to San Diego

      • It's time to figure out your trip dates for your flight from Billings Logan International Airport to San Diego. July is the busiest month for a trip to San Diego. If you like a quieter vibe, go in December.

      • The warmest month in San Diego is August, with temperatures ranging between 16ºC (61ºF) and 27ºC (81ºF). Book your Billings Logan International Airport to San Diego plane ticket then if that's your idea of comfortable weather.

      • February sees average temperatures of between 8ºC (46ºF) and 22ºC (72ºF). Look for a cheap ticket from BIL to San Diego around that time if you want to travel when it's cooler.

      More about San Diego

      • Once you've booked your flight from Billings Logan International Airport to San Diego, choose a hotel that puts you right where the action is. Make one of these accommodation options your base for exploring San Diego:

      • All great adventures should include some sightseeing. San Diego Balboa Park, San Diego Zoo and USS Midway Museum are must-visits when exploring San Diego.

      Explore more of the United States

      • You've done San Diego, now it's time to explore other parts of the United States. Journey about 177 kilometers northwest to Los Angeles to check off its top sights. From Hollywood Sign to Universal Studios Hollywood and Hollywood Bowl, there's plenty to keep you busy.

      • If you're ready to explore another great destination in the United States, consider Phoenix, roughly 483 kilometers east of San Diego. Camelback Mountain, Yayoi Kusama Fireflies Infinity Mirror Room and Heard Museum are key reasons to visit.

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.