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$605+ 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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
BLL — SFO
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Cheapflights Tip: The best prices from Billund to San Francisco are usually found in February or November, booked 48 days in advance, depart on a Tuesday or Wednesday and return on a Sunday

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 October 16, 2025.

This Flysmarter deal was found by Cheapflights users on 10/16. 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.
Fri 11/216:30 amBLL - SFO
2 stops23h 52mAir Canada
Mon 12/18:25 amSFO - BLL
2 stops19h 55mAir Canada
Deal found 10/16$605
This Flysmarter deal was found by Cheapflights users on 10/15. 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.
Fri 11/216:30 amBLL - SFO
2 stops23h 52mMultiple Airlines
Mon 12/18:38 amSFO - BLL
2 stops19h 42mMultiple Airlines
Deal found 10/15$619
This Ticket deal was found by Cheapflights users on 10/16. 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.
Fri 11/216:30 amBLL - SFO
2 stops23h 51mLufthansa
Mon 12/11:35 pmSFO - BLL
1 stop14h 45mLufthansa
Deal found 10/16$631
This Travelis deal was found by Cheapflights users on 10/15. 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.
Sat 11/12:15 pmBLL - SFO
1 stop14h 55mLufthansa
Wed 11/57:00 amSFO - BLL
2 stops21h 25mLufthansa
Deal found 10/15$634
This Travelis deal was found by Cheapflights users on 10/15. 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.
Wed 12/176:35 amBLL - SFO
1 stop15h 05mLufthansa
Wed 1/71:35 pmSFO - BLL
2 stops24h 35mLufthansa
Deal found 10/15$654

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 October 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$605
(Flysmarter)

Popular in

July

Cheapest in

February

Average price

$728
Provider with most accurate pricing for Billund-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Billund-San Francisco flights.
Search Deals
From Billund to San Francisco
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($132 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 16, 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

Fri 11/21

6:30 am-9:22 pm

2 stops23h 52m

San Francisco

Mon 12/1

8:25 am-1:20 pm

2 stops19h 55m

$605

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

Fri 11/21

6:30 am-9:22 pm

2 stops23h 52m

San Francisco

Mon 12/1

8:38 am-1:20 pm

2 stops19h 42m

$619

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

Fri 11/21

6:30 am-9:21 pm

2 stops23h 51m

San Francisco

Mon 12/1

1:35 pm-1:20 pm

1 stop14h 45m

$631

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

Sat 11/1

2:15 pm-9:10 pm

1 stop14h 55m

San Francisco

Wed 11/5

7:00 am-1:25 pm

2 stops21h 25m

$634

BillundSan Francisco

BLL - SFO

BLLSFO

Billund

Wed 12/17

6:35 am-12:40 pm

1 stop15h 05m

San Francisco

Wed 1/7

2:40 pm-1:25 pm

1 stop13h 45m

$655

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

  • Most accurate provider: When it comes to deals on Billund-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Billund-San Francisco flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Billund-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Billund-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 Billund-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 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 October 10, 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, February is the cheapest month in which you can book a flight from Billund to San Francisco (average of $510). Flying from Billund to San Francisco in July is currently the most expensive (average of $755). 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 October 16, 2025.
Read through reviews of airlines operating flights from Billund to San Francisco, such as Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Lufthansa
6.8
Okay
7,497 reviews

Crew

7.6

Entertainment

6.4

Overall

6.8

Comfort

6.8

Food

6.3

Boarding

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jan 2025

FRA - TPA

I had ordered a gluten-free meal through you I double triple checked that through you got screamed at by one of your representatives. She yelled at me and said that she had ordered the mail, she had chosen my seat, and made sure that all my baggage is were paid for. That was a lie. My experience with discover airlines in and of itself was GOOD but your representative was out of line did not do anything that she screamed at me and told me she did and I literally had to call the airlines myself to get my seat selected to double check on my gluten-free meal which still was not on board and to pay for my bags which I thought that I paid for all of them until I got to the airport and I still had to pay for my check back. So cheap flights I will never use you again.
Lufthansa
6.8
Okay
7,497 reviews
Lufthansa
6.8
Okay
7,497 reviews

Crew

7.6

Entertainment

6.4

Overall

6.8

Comfort

6.8

Food

6.3

Boarding

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jan 2025

FRA - TPA

I had ordered a gluten-free meal through you I double triple checked that through you got screamed at by one of your representatives. She yelled at me and said that she had ordered the mail, she had chosen my seat, and made sure that all my baggage is were paid for. That was a lie. My experience with discover airlines in and of itself was GOOD but your representative was out of line did not do anything that she screamed at me and told me she did and I literally had to call the airlines myself to get my seat selected to double check on my gluten-free meal which still was not on board and to pay for my bags which I thought that I paid for all of them until I got to the airport and I still had to pay for my check back. So cheap flights I will never use you again.

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.

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

    A quick flight from Billund to San Francisco can take about 23h 52m. Air Canada provides one of the quickest options available for as low as $605. The distance between Billund and San Francisco is about 5382 mi.

  • What is the cheapest airline to fly from Billund to San Francisco round-trip?

    Lufthansa, at $537, was found to be the cheapest airline from Billund to San Francisco.. Lufthansa is priced at 31% 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, February is the cheapest month in which you can book a flight from Billund to San Francisco (average of $510). Flying from Billund to San Francisco in July is currently the most expensive (average of $755). 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
Turlock
Antioch
Watsonville
Santa Clara
Manteca
Sunnyvale
Vacaville
Vallejo
Hollister
Foster City
Union City
Fairfield
Burlingame
Redwood City
Lodi
San Mateo

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Top airline flying from Billund to San Francisco

Discover the top airline 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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$537Average$688FlexibilityNo cancel feeOn-time76%

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