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$360+ Cheap flights from Bilbao (BIO) to San Diego (SAN)

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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — SAN
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
1 adult, Economy
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Cheap flight deals from Bilbao to San Diego

Cheapest flights from Bilbao to San Diego
Explore the most affordable flight options available from Bilbao to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 16, 2026.

This KLM deal was found by Cheapflights users on 3/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:45 am
BIO
-
SAN
1 stop14h 05m
Multiple Airlines
Tue 5/53:15 pm
SAN
-
BIO
2 stops17h 15m
Multiple Airlines
Deal found 3/14$826
This Delta deal was found by Cheapflights users on 3/11. 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.
Wed 3/257:25 am
BIO
-
SAN
2 stops21h 42m
Delta
Sun 4/2610:05 am
SAN
-
BIO
2 stops22h 25m
Delta
Deal found 3/11$849
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Thu 11/56:45 am
BIO
-
SAN
2 stops24h 43m
United Airlines
Mon 11/912:45 pm
SAN
-
BIO
2 stops25h 20m
United Airlines
Deal found 3/11$850
This United Airlines deal was found by Cheapflights users on 3/11. 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 3/257:25 am
BIO
-
SAN
1 stop17h 20m
United Airlines
Sun 4/2611:00 am
SAN
-
BIO
2 stops21h 00m
United Airlines
Deal found 3/11$861
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Sat 4/186:50 am
BIO
-
SAN
2 stops21h 03m
United Airlines
Fri 5/16:15 am
SAN
-
BIO
2 stops32h 10m
United Airlines
Deal found 3/14$864

Find flight deals from Bilbao to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Bilbao (BIO) to San Diego (SAN). 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 March 16, 2026.

Round-trip from

$826
(KLM)

One-way from

$360
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$846
From Bilbao to San Diego
Search Deals
One-way flight from Bilbao to San Diego
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($211 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($52 potential savings vs. average RT price).
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Average for round-trip flights in March 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Bilbao to San Diego 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 March 16, 2026.
Use the filters below to find and compare flights from Bilbao to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Wed 3/25

7:25 am-4:45 pm

1 stop17h 20m

San Diego

Sun 4/26

5:15 pm-5:55 pm

1 stop15h 40m

$860

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Wed 3/25

6:50 am-9:07 pm

2 stops22h 17m

San Diego

Sun 4/26

10:05 am-5:30 pm

2 stops22h 25m

$909

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Mon 8/24

12:00 pm-11:50 am

1 stop32h 50m

San Diego

Sun 8/30

6:15 am-9:50 am

2 stops18h 35m

$1,033

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Mon 8/24

6:50 am-8:29 pm

2 stops22h 39m

San Diego

Sun 8/30

4:07 pm-11:25 pm

2 stops22h 18m

$1,036

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Fri 3/27

11:55 am-1:05 pm

1 stop33h 10m

San Diego

Tue 3/31

1:40 pm-10:45 pm

1 stop24h 05m

$1,053

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Fri 3/27

11:55 am-1:05 pm

1 stop33h 10m

San Diego

Tue 3/31

1:40 pm-11:15 am

1 stop36h 35m

$1,094
Cheapest one-way

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Wed 4/29

7:15 pm-2:10 pm

3 stops51h 55m

$392

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Sat 5/2

4:00 pm-11:40 am

3 stops52h 40m

$399

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Fri 5/1

9:40 pm-8:34 am

3 stops43h 54m

$467

BilbaoSan Diego

BIO - SAN

BIOSAN

Bilbao

Mon 3/30

6:50 pm-9:21 pm

3 stops59h 31m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/15

Showing 1-10 of 15 resultsSorted by cheapest first
1
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Best time to book a flight from Bilbao to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Bilbao 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 Bilbao to San Diego

What is the cheapest month to book a flight from Bilbao to San Diego?

Currently, October is the cheapest month in which you can book a flight from Bilbao to San Diego (average of $628). Flying from Bilbao to San Diego in September is currently the most expensive (average of $1,242). 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.

Related info for your journey

Find useful and relevant information for your journey from Bilbao to San Diego. 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 Bilbao to San Diego?

    There are many flights that can get you from Bilbao to San Diego in 17h 20m. Fly via United Airlines or Delta to get the fastest option. Bilbao and San Diego are separated by a distance of 5742 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Bilbao to San Diego that include hotel bookings?

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

  • How can I find direct flights from Bilbao to San Diego?

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

  • Can I find deals for business class flights from Bilbao to San Diego?

    Yes. Cheapflights offers flight deals from Bilbao to San Diego 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 Bilbao to San Diego?

    Currently, October is the cheapest month in which you can book a flight from Bilbao to San Diego (average of $628). Flying from Bilbao to San Diego in September is currently the most expensive (average of $1,242). 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 Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

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