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$254+ Cheap flights from Billings to San Francisco (BIL - SFO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — SFO
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
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 December 26, 2025.

This United Airlines deal was found by Cheapflights users on 12/25. 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 12/305:50 pmBIL - SFO
2 stops19h 12mUnited Airlines
Wed 12/312:29 pmSFO - BIL
1 stop5h 55mUnited Airlines
Deal found 12/25$620
This American Airlines deal was found by Cheapflights users on 12/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:50 amBIL - SFO
1 stop10h 08mAmerican Airlines
Wed 12/311:13 pmSFO - BIL
1 stop8h 41mAmerican Airlines
Deal found 12/24$759
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Fri 12/265:50 pmBIL - SFO
1 stop6h 15mUnited Airlines
Wed 12/3110:35 pmSFO - BIL
2 stops13h 49mUnited Airlines
Deal found 12/24$778
This Alaska Airlines deal was found by Cheapflights users on 12/25. 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 12/263:27 pmBIL - SFO
1 stop5h 22mAlaska Airlines
Wed 12/315:53 pmSFO - BIL
2 stops19h 54mAlaska Airlines
Deal found 12/25$864
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Fri 12/265:50 pmBIL - SFO
2 stops14h 30mUnited Airlines
Tue 12/3010:35 pmSFO - BIL
2 stops13h 49mUnited Airlines
Deal found 12/24$886
This Delta deal was found by Cheapflights users on 12/26. 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 12/265:14 amBIL - SFO
1 stop4h 49mDelta
Tue 12/309:53 amSFO - BIL
1 stop6h 47mDelta
Deal found 12/26$909

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 December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$254
(Alaska Airlines)

Popular in

June

Cheapest in

May

Average price

$457
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
Highest demand for flights based on searches. 7% potential increase in price ($27 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 December 2025
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 December 26, 2025.
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

Sat 1/17

3:35 pm-7:43 pm

1 stop5h 08m

San Francisco

Tue 1/20

4:46 pm-11:36 pm

1 stop5h 50m

$254

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Fri 1/23

5:15 am-9:00 am

1 stop4h 45m

San Francisco

Mon 1/26

5:05 pm-10:31 pm

1 stop4h 26m

$275

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Fri 1/23

3:35 pm-8:11 am

2 stops17h 36m

San Francisco

Mon 1/26

9:00 am-11:36 pm

1 stop13h 36m

$284

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Sat 1/10

2:02 pm-8:12 pm

1 stop7h 10m

San Francisco

Wed 1/14

1:19 pm-11:36 pm

2 stops9h 17m

$538

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Thu 1/8

2:02 pm-8:12 pm

1 stop7h 10m

San Francisco

Mon 1/12

9:56 am-11:36 pm

2 stops12h 40m

$538

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Mon 12/29

6:25 am-1:33 pm

1 stop8h 08m

$455

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Sat 1/3

5:50 pm-7:46 am

2 stops14h 56m

$481

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Sat 1/3

5:15 am-9:03 am

1 stop4h 48m

$550

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Mon 12/29

2:40 pm-8:45 am

2 stops19h 05m

$582

BillingsSan Francisco

BIL - SFO

BILSFO

Billings Logan Intl

Mon 12/29

3:27 pm-11:54 pm

2 stops9h 27m

$662

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Billings-San Francisco flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 $332). 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.

What is the cheapest time of day to fly from BIL to SFO?

Find hourly flight availability from Billings to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 26, 2025.

One of the essential ways to save on airfare from Billings to San Francisco is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 40% on airfare.

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 December 26, 2025.
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
11,534 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,534 reviews
Alaska Airlines
8.0
Very good
11,534 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
7.9
Good
8,014 reviews
Alaska Airlines
8.0
Very good
11,534 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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 45m. Fly via 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, Alaska Airlines ($191), and Delta ($236) offers the cheapest pricing from Billings to San Francisco. These flights start at 42% 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 $332). 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
Roseville
South San Francisco
Santa Cruz
Livermore
Turlock
Manteca
Watsonville
Redwood City
Sunnyvale
San Bruno
Daly City
Santa Clara
San Carlos
Vallejo
Hollister
San Ramon
Foster City
Union City
Davis
Emeryville

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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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$191Average$328FlexibilityNo cancel feeOn-time75%
DeltaCheapest$236Average$288FlexibilityNo cancel feeOn-timeN/A

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