BIL - SFO

$109 Find Cheap Flights from Billings to San Francisco

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 Francisco departing on 3/3. 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 Francisco

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

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Everything you should know

Cheapest round-trip
$217
Overall average: $274
Delta
Tue 2/17Tue 2/24
BIL - SFO • 1 stop
Cheapest one-way
$109
Typical prices: $191-$360
Delta
Tue 3/3
BIL - SFO • 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
September
Cheapest • 23% price drop
May
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 Francisco!
Flight Deals
Booking Insights
Flight Deals

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

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

Tue, Feb 17 - Tue, Feb 24
Delta Logo
6:15 pm - 11:54 pm
BIL
-
SFO
6h 39m
1 stop
Delta Logo
9:55 am - 5:27 pm
SFO
-
BIL
6h 32m
1 stop
$217Delta
Tue, Feb 17 - Tue, Feb 24
Delta Logo
6:15 pm - 11:54 pm
BIL
-
SFO
6h 39m
1 stop
Delta Logo
5:55 am - 5:27 pm
SFO
-
BIL
10h 32m
2 stops
$230Delta
Sat, Mar 28 - Tue, Mar 31
Delta Logo
11:34 am - 4:07 pm
BIL
-
SFO
5h 33m
1 stop
Delta Logo
5:40 am - 10:53 am
SFO
-
BIL
4h 13m
1 stop
$246Delta
Fri, Apr 24 - Tue, Apr 28
Alaska Airlines Logo
12:49 pm - 4:46 pm
BIL
-
SFO
4h 57m
1 stop
Alaska Airlines Logo
10:25 am - 10:59 pm
SFO
-
BIL
11h 34m
1 stop
$265Alaska Airlines
Tue, Feb 24 - Sat, Feb 28
Alaska Airlines Logo
3:32 pm - 7:47 pm
BIL
-
SFO
5h 15m
1 stop
Alaska Airlines Logo
4:21 pm - 11:38 pm
SFO
-
BIL
6h 17m
1 stop
$276Alaska Airlines
Tue, Feb 24 - Sat, Feb 28
United Airlines Logo
5:53 pm - 11:17 pm
BIL
-
SFO
6h 24m
1 stop
United Airlines Logo
5:10 am - 1:23 pm
SFO
-
BIL
7h 13m
1 stop
$287United Airlines
Fri, Apr 24 - Tue, Apr 28
Alaska Airlines Logo
12:49 pm - 4:46 pm
BIL
-
SFO
4h 57m
1 stop
Alaska Airlines Logo
11:10 am - 10:59 pm
SFO
-
BIL
10h 49m
2 stops
$294Alaska Airlines
Tue, May 5 - Fri, May 8
Alaska Airlines Logo
12:49 pm - 4:46 pm
BIL
-
SFO
4h 57m
1 stop
Alaska Airlines Logo
7:59 pm - 12:09 pm
SFO
-
BIL
15h 10m
1 stop
$297Alaska Airlines
Fri, Apr 24 - Tue, Apr 28
Alaska Airlines Logo
12:49 pm - 4:46 pm
BIL
-
SFO
4h 57m
1 stop
Alaska Airlines Logo
8:45 am - 10:59 pm
SFO
-
BIL
13h 14m
2 stops
$303Alaska Airlines
Thu, Apr 16 - Mon, Apr 20
Alaska Airlines Logo
7:56 am - 2:01 pm
BIL
-
SFO
7h 05m
1 stop
Alaska Airlines Logo
8:00 am - 1:25 pm
SFO
-
BIL
4h 25m
1 stop
$307Alaska Airlines
Booking Insights

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Billings to San Francisco, 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 Francisco is September, where tickets cost $254 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $457 and $385 respectively.

Good to know

Low seasonSeptember
Cheapest flight$109
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Billings to San Francisco

When to book flights from Billings to San Francisco

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

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

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

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

    No

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Billings to San Francisco are Alaska Airlines and Delta. With an average price for the route of $317 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 $284 and an overall rating of 7.9.

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

    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 Francisco.

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

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

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

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

Reviews of the top airlines flying from Billings to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from Billings to San Francisco. 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 Francisco? 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 11804 reviews
7.8Comfort
8.5Crew
8.1Boarding
7.0Entertainment
7.1Food
Airline reviews

Overall it was fine, however one of my two checked bags did not arrive and I was told it was left in Palm Springs. I don't understand how one of the two bags made it through fine but the other got lost .

6.0 GoodWilliam, Jan 2026
PSP - SFO
Read more Alaska Airlines reviews

Overall it was fine, however one of my two checked bags did not arrive and I was told it was left in Palm Springs. I don't understand how one of the two bags made it through fine but the other got lost .

The seats are very small. I’m 5’ 3”, so don’t think I should notice. The food selection was non existent and very disappointing. 5 hour flight plus TSA, etc. I would have appreciated a small salad, crudités. Something fresher not just chips.

Was notified the departure would be late. Later on it was suddenly on time. Traffic by LAX was horrendous, and I missed the flight.

you sent me to some shitty "Airfaireassist" thing that did a bait and switch on the faire. Won't be using Kayak ever again

Every thing is on time, boarding, landing nice and smooth. But No tv? No food for 6 hours flight?

I don’t think Alaska coordinates with Kayak. I did not get a “check-in” email inviting me to check in 24 hours in advance. Had to wait 20+ minutes to get a wheel chair.

The plane was delayed which was annoying. No seat back screens is a bummer. Staff if great

First Class seats had no more legroom then Premium Economy. There was no working WiFi or entertainment. I would have rather paid $400 more and flown on United for the 6 hours from EWR to SFO.

Overall the flight was on-time and plane ride very comfortable. The free snacks not so good - only a small bag of pretzels and no milk. I wanted milk. There was not entertainment on the plane unless I wanted to download their APP. But I would consider flying with them again and be more prepared on my part with food and entertainment.

This was more with the third party booking through Kayak but my KTN for Pre-TSA, even though I entered it, wasn't assigned to my ticket when I got to the airport. I had to go through regular security. Also the Alaska app had trouble loading my ticket in the first place and I had to ask for it to be printed. Alaska Airlines was great but wanted you to know about this hiccup in the ticketing interface.

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.

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

Information on your arrival and departure airports