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$145+ Cheap flights from Billings to San Francisco (BIL - SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/20. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — SFO
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
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Cheap flight deals from Billings to San Francisco

Cheapest flights from Billings to San Francisco
Explore the most affordable flight options available from Billings to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 20, 2026.

This United Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:53 pm
BIL
-
SFO
1 stop6h 24m
United Airlines
Sat 2/285:10 am
SFO
-
BIL
1 stop7h 13m
United Airlines
Deal found 1/20$217
This Alaska Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/243:32 pm
BIL
-
SFO
1 stop5h 15m
Alaska Airlines
Sat 2/284:21 pm
SFO
-
BIL
1 stop6h 17m
Alaska Airlines
Deal found 1/19$236
This United Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/45:53 pm
BIL
-
SFO
1 stop6h 24m
United Airlines
Thu 3/125:05 am
SFO
-
BIL
1 stop7h 18m
United Airlines
Deal found 1/19$246
This Delta deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:45 am
BIL
-
SFO
1 stop4h 24m
Delta
Tue 5/125:00 pm
SFO
-
BIL
1 stop4h 27m
Delta
Deal found 1/18$253
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/55:10 am
BIL
-
SFO
1 stop4h 50m
Delta
Tue 3/106:00 am
SFO
-
BIL
2 stops10h 41m
Delta
Deal found 1/19$259
This Alaska Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2412:49 pm
BIL
-
SFO
1 stop4h 57m
Alaska Airlines
Tue 4/289:00 am
SFO
-
BIL
1 stop12h 59m
Alaska Airlines
Deal found 1/19$265
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/55:10 am
BIL
-
SFO
1 stop4h 50m
Delta
Thu 3/125:40 am
SFO
-
BIL
1 stop4h 13m
Delta
Deal found 1/19$275
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/285:15 am
BIL
-
SFO
1 stop4h 41m
Delta
Tue 3/315:40 am
SFO
-
BIL
1 stop4h 13m
Delta
Deal found 1/20$278
This Delta deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:45 am
BIL
-
SFO
1 stop4h 24m
Delta
Mon 5/115:00 pm
SFO
-
BIL
1 stop4h 27m
Delta
Deal found 1/18$289

Find flight deals from Billings to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Billings (BIL) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$217
(United Airlines)

One-way from

$145
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$269
Provider with most accurate pricing for Billings Logan Intl-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Billings Logan Intl-San Francisco flights.
Search Deals
From Billings Logan Intl to San Francisco
Search Deals
One-way flight from Billings Logan Intl to San Francisco
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Billings to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 20, 2026.
Use the filters below to find and compare flights from Billings to San Francisco that are best for you.

Fly from

Billings

Fly to

San Francisco

Route

Depart

Return

Price

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Tue 2/24

5:53 pm-11:17 pm

1 stop6h 24m

San Francisco

Sat 2/28

5:10 am-1:23 pm

1 stop7h 13m

$217

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Tue 2/24

2:04 pm-8:36 pm

1 stop7h 32m

San Francisco

Sat 2/28

4:21 pm-11:38 pm

1 stop6h 17m

$236

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Thu 3/5

5:10 am-9:00 am

1 stop4h 50m

San Francisco

Tue 3/10

5:40 am-10:53 am

1 stop4h 13m

$246

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Wed 3/4

5:53 pm-11:17 pm

1 stop6h 24m

San Francisco

Thu 3/12

5:05 am-1:23 pm

1 stop7h 18m

$246

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Fri 4/24

12:49 pm-4:46 pm

1 stop4h 57m

San Francisco

Tue 4/28

12:26 pm-10:59 pm

1 stop9h 33m

$265

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Tue 5/5

12:49 pm-4:46 pm

1 stop4h 57m

San Francisco

Fri 5/8

7:40 am-1:26 pm

1 stop4h 46m

$265

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Thu 3/5

5:10 am-9:00 am

1 stop4h 50m

San Francisco

Thu 3/12

5:40 am-10:53 am

1 stop4h 13m

$275

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Sat 3/28

5:15 am-8:56 am

1 stop4h 41m

San Francisco

Tue 3/31

5:40 am-10:53 am

1 stop4h 13m

$278

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Sat 6/20

5:00 am-9:29 am

1 stop5h 29m

$145

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Sat 6/20

3:40 pm-11:52 pm

2 stops9h 12m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

Showing 1-10 of 17 results
1
2

Compare providers for flights from Billings to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Billings to San Francisco in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Billings-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Billings-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Billings-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Billings-San Francisco flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Billings-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Billings to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Billings with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Billings to San Francisco?

Currently, August is the cheapest month in which you can book a flight from Billings to San Francisco (average of $137). Flying from Billings to San Francisco in June is currently the most expensive (average of $331). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated January 20, 2026.
Get a feel of what it's like to fly with Alaska Airlines and Delta from Billings to San Francisco by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,761 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,761 reviews
Alaska Airlines
8.0
Very good
11,761 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,080 reviews
Alaska Airlines
8.0
Very good
11,761 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

Related info for your journey

Find useful and relevant information for your journey from Billings to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Billings to San Francisco?

    There are many flights that can get you from Billings to San Francisco in 4h 50m. Fly via United Airlines, Alaska Airlines, or Delta to get the fastest option. There are 908 mi between Billings and San Francisco. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Billings to San Francisco round-trip?

    According to our current data, Delta ($244), and Alaska Airlines ($254) offers the cheapest pricing from Billings to San Francisco. These flights start at 25% lower than the current average price 3 months from now.

  • Can I find deals for flights from Billings to San Francisco that include hotel bookings?

    Yes. In addition to deals on Billings to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Billings to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Billings to San Francisco.

  • Can I find deals for business class flights from Billings to San Francisco?

    Yes. Cheapflights offers flight deals from Billings to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, August is the cheapest month in which you can book a flight from Billings to San Francisco (average of $137). Flying from Billings to San Francisco in June is currently the most expensive (average of $331). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
South San Francisco
Santa Cruz
Roseville
Santa Clara
Livermore
Watsonville
San Bruno
Daly City
Sunnyvale
Vacaville
Turlock
San Carlos
San Ramon
Manteca
Vallejo
San Lorenzo
Davis
Hollister
Redwood City
Union City

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Billings to San Francisco

Discover the top 2 airlines that operate flights from Billings to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$244Average$284FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$254Average$317FlexibilityNo cancel feeOn-time75%

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