SFO - BIL

$109 Find Cheap Flights from San Francisco to Billings

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Billings departing on 2/21. 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 Billings

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Billings, 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 San Francisco to Billings, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$217
Overall average: $293
Delta
Sat 2/21Tue 3/10
SFO - BIL • 1 stop
Cheapest one-way
$109
Delta
Sat 2/21
SFO - BIL • 1 stop
Top airlines
Delta
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
February
Cheapest • 28% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Billings!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Francisco to Billings (SFO-BIL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Billings 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 San Francisco to Billings

Sat, Feb 21 - Tue, Mar 10
Delta Logo
5:55 am - 11:00 am
SFO
-
BIL
4h 05m
1 stop
Delta Logo
6:21 pm - 11:59 pm
BIL
-
SFO
6h 38m
1 stop
$217Delta
Thu, Feb 26 - Wed, Mar 11
Alaska Airlines Logo
7:50 am - 1:24 pm
SFO
-
BIL
4h 34m
1 stop
Alaska Airlines Logo
3:32 pm - 7:47 pm
BIL
-
SFO
5h 15m
1 stop
$246Alaska Airlines
Thu, Feb 26 - Mon, Mar 9
Multiple Airlines Logo
10:48 am - 9:32 am
SFO
-
BIL
21h 44m
1 stop
Multiple Airlines Logo
9:59 am - 8:09 pm
BIL
-
SFO
35h 10m
2 stops
$247Multiple Airlines
Thu, Feb 19 - Mon, Mar 9
Multiple Airlines Logo
8:34 pm - 9:32 am
SFO
-
BIL
11h 58m
1 stop
Multiple Airlines Logo
9:59 am - 8:09 pm
BIL
-
SFO
35h 10m
2 stops
$248Multiple Airlines
Sun, Feb 8 - Mon, Mar 9
Multiple Airlines Logo
9:32 pm - 9:49 am
SFO
-
BIL
11h 17m
1 stop
Multiple Airlines Logo
9:59 am - 8:09 pm
BIL
-
SFO
35h 10m
2 stops
$251Multiple Airlines
Tue, Feb 24 - Sat, Mar 7
Alaska Airlines Logo
4:21 pm - 11:38 pm
SFO
-
BIL
6h 17m
1 stop
Alaska Airlines Logo
3:32 pm - 7:47 pm
BIL
-
SFO
5h 15m
1 stop
$255Alaska Airlines
Mon, Feb 23 - Sat, Mar 7
Alaska Airlines Logo
7:50 am - 1:24 pm
SFO
-
BIL
4h 34m
1 stop
Alaska Airlines Logo
3:32 pm - 7:47 pm
BIL
-
SFO
5h 15m
1 stop
$265Alaska Airlines
Thu, Feb 26 - Fri, Mar 6
Multiple Airlines Logo
10:48 am - 9:32 am
SFO
-
BIL
21h 44m
1 stop
Multiple Airlines Logo
9:59 am - 8:49 am
BIL
-
SFO
23h 50m
1 stop
$267Multiple Airlines
Thu, Feb 19 - Fri, Mar 6
Multiple Airlines Logo
8:34 pm - 9:32 am
SFO
-
BIL
11h 58m
1 stop
Multiple Airlines Logo
9:59 am - 8:49 am
BIL
-
SFO
23h 50m
1 stop
$268Multiple Airlines
Mon, Feb 23 - Wed, Mar 11
Delta Logo
9:30 pm - 11:00 am
SFO
-
BIL
12h 30m
2 stops
Delta Logo
6:21 pm - 11:59 pm
BIL
-
SFO
6h 38m
1 stop
$270Delta
Booking Insights

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Billings, 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 San Francisco to Billings is February, where tickets cost $293 (return) on average. On the other hand, the most expensive months are December and October, where the average cost of round-trip tickets is $581 and $553 respectively.

Good to know

Low seasonJanuary
Cheapest flight$109
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from San Francisco to Billings

When to book flights from San Francisco to Billings

Are your dates flexible? Find out the best times to travel from San Francisco to Billings 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 San Francisco to Billings

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

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

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from San Francisco to Billings are Alaska Airlines and Delta. With an average price for the route of $546 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 $349 and an overall rating of 7.9.

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

    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 San Francisco to Billings.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Billings from San Francisco 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 San Francisco to Billings?

    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 Billings with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and BIL 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 San Francisco to Billings?

    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 Billings from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Billings. 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 San Francisco to Billings? 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 11808 reviews
7.0Entertainment
7.8Comfort
8.5Crew
8.1Boarding
7.1Food
Airline reviews

The stewardess are very nice and pleasant, Someone onboard had a medical attention, and they attended that person non-stop all throughout the flight, and yet, did not forget to serve and help other passengers.

10.0 ExcellentAnonymous, Jan 2026
SFO - MCO
Read more Alaska Airlines reviews

The stewardess are very nice and pleasant, Someone onboard had a medical attention, and they attended that person non-stop all throughout the flight, and yet, did not forget to serve and help other passengers.

The Alaska Airlines app made it very difficult to find my boarding pass. It was very frustrating to use! The flight itself was flawless.

The flight was excellent and very friendly and helpful staff. Will travel again and recommend to friends. Thank you

Did not have In flight service on my round trip due to turbulence. I did not partake in In flight entertainment. Flight descending into LAX was very turbulent. It would have been nice if the pilot communicated with us during that rough descent into LAX to ease the minds of some of us more nervous flyers.

They canceled my flight with only a couple hours before checking in at the airport and offered no alternatives to get home.

I had entered my TSA pre number when I bought the ticket but TSA pre was not on my boarding pass. I went to find an agent at check in and there was only one agent one duty for first class and a line of people waiting for check in/baggage with no agent manning that area.

Comfort level was below par. Food selection was non-existent. Paying $35 for 1st bag is never appreciated. I will not fly them again. I am actually trying to change my return flight.

The flight attendants were excellent and I was in the back of the plane. Much much better than recent JetBlue experiences on that route and better than Delta on that route.

I’m not sure there is anything that can be improved, even the cost was fantastic.

Poor. They should have given me a row with more room and instead they put me in a middle seat with two strangers next to me

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

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.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

The flight crew where really good. Better then the crew from BNE to SFO

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

left on time, reasonable boarding process arrived early luggage came out quickly

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.

This was an older airplane. The cabin was constantly warm to hot throughout the 10 hour flight and there were no vents to personalize air flow. Also since it was an older plane, the material and comfort of the chairs were very uncomfortable. I left my flight with major soreness on my tailbone.

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

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

Information on your arrival and departure airports