BIL - SAN

$109 Find Cheap Flights from Billings to San Diego

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Billings to San Diego departing on 4/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Diego

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billings to San Diego, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billings to San Diego, as well as popular online travel agencies
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$217
Typical prices: $306-$521
United Airlines
Sat 2/28Sat 3/7
BIL - SAN • 1 stop
Cheapest one-way
$109
Overall average: $325
United Airlines
Sat 4/25
BIL - SAN • 1 stop
Top airlines
United Airlines
Cheapest • from $217 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 19% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Diego!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Billings to San Diego (BIL-SAN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Billings to San Diego that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Billings to San Diego

Sat, Feb 28 - Sat, Mar 7
United Airlines Logo
2:35 pm - 8:51 pm
BIL
-
SAN
7h 16m
1 stop
United Airlines Logo
6:30 am - 1:23 pm
SAN
-
BIL
5h 53m
1 stop
$217United Airlines
Sat, Feb 28 - Sat, Mar 7
United Airlines Logo
2:35 pm - 11:40 pm
BIL
-
SAN
10h 05m
2 stops
United Airlines Logo
6:30 am - 1:23 pm
SAN
-
BIL
5h 53m
1 stop
$222United Airlines
Tue, Mar 3 - Wed, Mar 4
American Airlines Logo
7:25 am - 12:03 pm
BIL
-
SAN
5h 38m
1 stop
American Airlines Logo
4:45 pm - 11:35 pm
SAN
-
BIL
5h 50m
1 stop
$237American Airlines
Sat, Apr 4 - Fri, Apr 10
United Airlines Logo
2:35 pm - 11:59 pm
BIL
-
SAN
10h 24m
2 stops
United Airlines Logo
6:32 am - 1:23 pm
SAN
-
BIL
5h 51m
1 stop
$259United Airlines
Tue, Feb 24 - Sat, Feb 28
Alaska Airlines Logo
3:32 pm - 8:12 pm
BIL
-
SAN
5h 40m
1 stop
Alaska Airlines Logo
3:45 pm - 11:38 pm
SAN
-
BIL
6h 53m
1 stop
$267Alaska Airlines
Sat, Feb 28 - Sat, Mar 7
United Airlines Logo
2:35 pm - 11:40 pm
BIL
-
SAN
10h 05m
2 stops
United Airlines Logo
11:03 am - 8:51 pm
SAN
-
BIL
8h 48m
2 stops
$270United Airlines
Wed, Apr 1 - Mon, Apr 13
Delta Logo
5:15 am - 8:45 am
BIL
-
SAN
4h 30m
1 stop
Delta Logo
5:00 pm - 10:24 pm
SAN
-
BIL
4h 24m
1 stop
$274Delta
Tue, Mar 3 - Wed, Mar 4
United Airlines Logo
7:00 am - 6:48 pm
BIL
-
SAN
12h 48m
2 stops
United Airlines Logo
11:05 am - 9:22 pm
SAN
-
BIL
9h 17m
2 stops
$277United Airlines
Wed, Apr 1 - Mon, Apr 13
Delta Logo
5:15 am - 2:44 pm
BIL
-
SAN
10h 29m
2 stops
Delta Logo
5:00 pm - 10:24 pm
SAN
-
BIL
4h 24m
1 stop
$279Delta
Mon, Mar 2 - Mon, Mar 9
Alaska Airlines Logo
2:04 pm - 9:49 pm
BIL
-
SAN
8h 45m
1 stop
Alaska Airlines Logo
9:08 pm - 1:24 pm
SAN
-
BIL
15h 16m
1 stop
$291Alaska Airlines
Booking Insights

KAYAK's insights & trends for Billings to San Diego flights

Get data-powered insights and trends into flights from Billings to San Diego to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Billings to San Diego?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Billings to San Diego departing in February.

What is the cheapest month to fly from Billings to San Diego?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Billings to San Diego, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Billings to San Diego is January, where tickets cost $310 (return) on average. On the other hand, the most expensive months are June and September, where the average cost of round-trip tickets is $491 and $409 respectively.

Good to know

Low seasonJuly
Cheapest flight$109
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Billings to San Diego

When to book flights from Billings to San Diego

Are your dates flexible? Find out the best times to travel from Billings to San Diego based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Billings to San Diego

  • Which public transportation mode is suitable for traveling from Billings to BIL?

    If you’d like to travel from Billings to BIL via public transport, you can board a bus or a taxi. The means you settle on will be determined by how quickly you’d like to get to the airport and how much you’re willing to part with as fare. If you’re in a rush, it’s in your best interest to board a taxi, while if you’re on a budget, it’s advisable that you board a bus.

  • Where can I get information at BIL?

    In case you’ve got a query you’d like answered at BIL, you should head to the airport’s information center. Manned by well-informed and professional staff, this center is situated in the Baggage Claim area near the exit stairs.

  • Does SAN have an on-site hotel?

    If you’d like to stay at a hotel within SAN’s grounds, you’ll have to settle for one of the hotels near the airport, as SAN has no on-site hotels. Some of the notable hotels near this airport include TownPlace Suites San Diego Airport, Sheraton San Diego Hotel & Marina, and Hampton Inn & Suites San Diego Airport Liberty Station.

  • Where is SAN’s USO lounge?

    SAN’s USO Lounge is situated in Terminal 2 East, near the Gate Parking Lot. Reserved for serving military members and their families, this lounge boasts comfortable seating, snacks, drinks, and several entertainment sources.

  • What is the cheapest flight from Billings to San Diego?

    In the last 3 days, the lowest price for a flight from Billings to San Diego was $109 for a one-way ticket and $217 for a round-trip.

  • Do I need a passport to fly between Billings and San Diego?

    No

  • Which airports will I be using when flying from Billings to San Diego?

    When flying out of Billings you will be using Billings Logan Intl. You will be landing at San Diego, also known as San Diego.

  • Which aircraft models fly most regularly from Billings to San Diego?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Billings to San Diego?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Billings and San Diego, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Billings to San Diego, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Billings to San Diego are Alaska Airlines and Delta. With an average price for the route of $370 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $360 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Billings to San Diego?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Billings to San Diego.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Billings to San Diego?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego from Billings is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Billings to San Diego?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Diego with an airline and back to Billings with another airline. Booking your flights between Billings and SAN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Billings to San Diego?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Diego from Billings up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Billings to San Diego

  • In Billings, you’ll board your flight to San Diego at Billings Logan International Airport (BIL). Situated two miles northwest of downtown Billings, this air transit station is a hub for Silver Airways, Cape Air & Nantucket Airlines, and Corporate Air. In San Diego, you’ll alight from your flight at San Diego International Airport (SAN). This international airport, located three miles northwest of San Diego, serves as a hub for Southwest Airlines, Alaska Airlines, West Air, and Pacific Southwest Airlines.
  • On the date you’re set to fly from BIL to SAN, arrive at BIL at least 1h 30min before your flight’s departure time. Arriving at the airport this early will ensure you go through the airport’s security gates in time for your flight. Additionally, it will ensure you have time to check out the points of interest at the airport.
  • If you’re traveling from BIL to SAN with your pet, you can let your pet take a leak in one of the airport’s pet relief areas. Currently, BIL is home to two pet relief areas. Both are situated outside of the airport’s main terminal.
  • In case you need emergency assistance at SAN, you should visit one of the Traveler’s Aid offices available at the airport. Traveler’s Aid is an organization that offers emergency services to stranded passengers. At SAN, it has offices in the Baggage Claim areas of Terminals 1 and 2.
  • If you’d like to rent a car once you land at SAN, you’ll have to head to the airport’s off-site car rental facility. Accessible from the airport’s terminals via shuttles, this center has counters for agencies such as Enterprise, Hertz, National, Alamo, and Avis.

Reviews of the top 3 airlines serving from Billings to San Diego

 
See real verified KAYAK customer reviews for airlines flying from Billings to San Diego. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Billings to San Diego? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 11825 reviews
7.8Comfort
8.5Crew
7.0Entertainment
7.1Food
8.1Boarding
Airline reviews

Due to plane delays on both legs of my flight home, I had to be rerouted from Santa Rosa to Las Vegas on Skywest and then to DCA on American. SkyWest airlines sat on runway in Las Vegas for 20 minutes waiting for gate to clear. My boarding pass for American that I was given by Alaska was incomplete and the Las Vegas airport lacked signage and departure boards. I barely made my flight bc it was so confusing. American Airlines has a much better wireless connection. I’ll never fly Alaska again. It clearly has problems.

2.0 MediocreAnonymous, Jan 2026
STS - SAN
Read more Alaska Airlines reviews

Due to plane delays on both legs of my flight home, I had to be rerouted from Santa Rosa to Las Vegas on Skywest and then to DCA on American. SkyWest airlines sat on runway in Las Vegas for 20 minutes waiting for gate to clear. My boarding pass for American that I was given by Alaska was incomplete and the Las Vegas airport lacked signage and departure boards. I barely made my flight bc it was so confusing. American Airlines has a much better wireless connection. I’ll never fly Alaska again. It clearly has problems.

We left about 30 minutes late due to ramp issues. It did not impact me, but I know others on the flight had very tight connections to Maui.

The crew was very friendly. Boarding was quick and efficient.

No WiFi. Terrible food. Very long walk to the gate and from the gate after landing. Gate changed without notice.

I enjoyed the Starlink access but didn't have much time to use it. It also kept dropping me so I gave up. The food was very good though when I asked for a different "dessert" they didn't have anything. Chocolate Brownie Cookies are not suitable for everyone...maybe children. The flight staff were amazing - at least in First Class! My first time ever! The trip from Boise to San Diego was FAR better than going to Boise.

One of the flight attendants treated my grandma who is 77 years old badly and would respond sarcastically. Example my grandma "do you have and honey by any chance" the flight attendant "does this look like a restaurant to you. She was also very rude to myself and my children giving us attitude and being sarcastic when answering.

we waited for 50 minutes to check a bag and missed a flight. do better.

The flight crew was very professional and pleasant. Our flight was delayed 3 hours, but Kayak informed me in advance

I really hate the seat assignment at the gate. I understand it is so families can sit together but it caused me and others a lot of unnecessary stress and confusion, enough for me to not fly Alaska again. The app is so awful that it did not even update my seat assignment on the boarding pass but sent me a notification of my seat... it showed in Apple Wallet but not in the Alaska app itself. That only made the stress worse. I think most people like myself prefer to know where they are seated at check in 24 hours before so they don't have to anxiously hang out at the gate the entire time. This is not a good use of your agents time either to be dealing with all of us asking where we are sitting. You should automatically assign the multiple seat purchases to be together before they check in and fill us solo travelers in those gaps as we check in.

Alaska Airlines have beautiful new airplanes that have comfortable seats but tight for a tall person like myself. They do provide upgrades to flyers but at a $140 cost. My flight went smooth and prompt as well as without a hitch. The flight crew were warm and friendly as well as very attentive. I'd recommend this airline over Frontier airlines any day.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

Food was surprisingly good but the WiFi was not great

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Flight was late - I was downgraded from first class to coach

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

Everything you need to know for your flight from Billings to San Diego

Information on your arrival and departure airports