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$596+ Cheap flights from Billund (BLL) to San Francisco (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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
BLL — SFO
août 19 — août 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Billund to San Francisco are usually found in November or February, booked 48 days in advance, depart on a Tuesday or Wednesday and return on a Sunday

Cheap flight deals from Billund to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Billund (BLL) 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 août 14, 2025.

Round-trip from

$626
(Flysmarter)

Popular in

July

Cheapest in

November

Average price

$821
From Billund to San Francisco
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($150 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Billund to San Francisco

Cheapest flights from Billund to San Francisco
Explore the most affordable flight options available from Billund to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on août 14, 2025.

This Ticket deal was found by Cheapflights users on 8/12. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 9/46:00 amBLL - SFO
1 stop15h 40mLufthansa
lun. 9/89:05 pmSFO - BLL
1 stop17h 10mLufthansa
Deal found 8/12$596
This Flysmarter deal was found by Cheapflights users on 8/12. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 9/46:00 amBLL - SFO
1 stop14h 45mMultiple Airlines
jeu. 9/118:25 pmSFO - BLL
1 stop17h 00mMultiple Airlines
Deal found 8/12$619
This Delta deal was found by Cheapflights users on 8/12. 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.
jeu. 9/46:00 amBLL - SFO
1 stop14h 45mDelta
lun. 9/812:30 pmSFO - BLL
2 stops18h 55mDelta
Deal found 8/12$624
This Flysmarter deal was found by Cheapflights users on 8/12. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/171:20 pmBLL - SFO
2 stops19h 09mBritish Airways
mer. 1/79:34 amSFO - BLL
2 stops17h 36mBritish Airways
Deal found 8/12$626
This Delta deal was found by Cheapflights users on 8/12. 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.
jeu. 9/410:15 amBLL - SFO
2 stops20h 54mDelta
jeu. 9/117:05 amSFO - BLL
2 stops19h 05mDelta
Deal found 8/12$635
This Lufthansa deal was found by Cheapflights users on 8/13. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 8/316:00 amBLL - SFO
1 stop22h 50mLufthansa
jeu. 9/49:05 pmSFO - BLL
1 stop17h 10mLufthansa
Deal found 8/13$640
This Travelis deal was found by Cheapflights users on 8/12. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/176:35 amBLL - SFO
1 stop15h 05mLufthansa
mer. 1/71:35 pmSFO - BLL
1 stop14h 55mLufthansa
Deal found 8/12$649

Cheapflights Fare Finder

 
Customize your flight search to find flights from Billund 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 août 14, 2025.
Use the filters below to find and compare flights from Billund to San Francisco that are best for you.

Fly from

Billund

Fly to

San Francisco

Route

Depart

Return

Price

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

mer. 12/17

1:20 pm-11:29 pm

2 stops19h 09m

San Francisco

mer. 1/7

7:25 am-12:10 pm

2 stops19h 45m

$626

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

dim. 8/31

6:00 am-7:50 pm

1 stop22h 50m

San Francisco

jeu. 9/4

9:05 pm-11:15 pm

1 stop17h 10m

$640

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

mer. 12/17

10:25 am-8:10 pm

1 stop18h 45m

San Francisco

mer. 1/7

2:40 pm-11:10 pm

1 stop23h 30m

$650

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

jeu. 8/28

10:15 am-11:45 am

1 stop34h 30m

San Francisco

mer. 12/3

3:50 pm-11:00 pm

1 stop22h 10m

$671

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

mer. 12/17

6:35 am-12:40 pm

1 stop15h 05m

San Francisco

mer. 1/7

2:40 pm-1:25 pm

1 stop13h 45m

$676

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

jeu. 8/28

6:00 am-11:45 am

1 stop14h 45m

San Francisco

mer. 12/3

10:00 am-2:35 pm

2 stops19h 35m

$687

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

dim. 8/31

6:00 am-11:45 am

1 stop14h 45m

San Francisco

jeu. 9/4

7:00 am-9:35 am

2 stops17h 35m

$1,181

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

mar. 8/26

10:45 am-7:57 pm

2 stops18h 12m

$930

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Best time to book a flight from Billund to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Billund 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 Billund to San Francisco

How far ahead should I book a flight from Billund to San Francisco?

Use this chart to determine the optimal time to book a round-trip flight from Billund to San Francisco. Price data was last updated on August 8, 2025.

Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from Billund to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Billund to San Francisco (average of $276). Flying from Billund to San Francisco in June is currently the most expensive (average of $358). 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.

How much does it cost to fly round-trip from Billund to San Francisco?

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 août 14, 2025.
Read through reviews of airlines operating flights from Billund to San Francisco, such as United Airlines and Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Lufthansa
6.8
Okay
7,317 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

Related info for your journey

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

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

    Lufthansa, at $537, was found to be the cheapest airline from Billund to San Francisco. An alternate airline flying to your destination would be United Airlines. Lufthansa is priced at 28% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Billund 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 Billund to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Billund to San Francisco (average of $276). Flying from Billund to San Francisco in June is currently the most expensive (average of $358). 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
Santa Cruz
Livermore
South San Francisco
Mountain View
Turlock
Santa Clara
Hollister
Antioch
Watsonville
Manteca
Sunnyvale
Newark
Milpitas
Campbell
Foster City
San Leandro
Burlingame
Redwood City
Vallejo

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Billund to San Francisco

Discover the top 2 airlines that operate flights from Billund 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 août 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$537Average$629FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$540Average$612FlexibilityNo cancel feeOn-time69%

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