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$595+ Cheap flights from St. Louis (STL) to Bilbao (BIO)

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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BIO
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap flight deals from St. Louis to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Bilbao (BIO). 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 August 14, 2025.

Round-trip from

$595
(United Airlines)
From Lambert-St Louis to Bilbao
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Find flight deals from St. Louis to Bilbao

Cheapest flights from St. Louis to Bilbao
Explore the most affordable flight options available from St. Louis to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/14. 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.
Sun 10/53:30 pmSTL - BIO
1 stop14h 55mUnited Airlines
Wed 10/156:45 amBIO - STL
1 stop13h 45mUnited Airlines
Deal found 8/14$595
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/51:30 pmSTL - BIO
2 stops21h 20mAir Canada
Wed 10/156:45 amBIO - STL
2 stops19h 53mAir Canada
Deal found 8/12$597
This Iberia deal was found by Cheapflights users on 8/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/58:03 pmSTL - BIO
2 stops17h 47mIberia
Wed 10/159:15 amBIO - STL
2 stops18h 11mIberia
Deal found 8/14$604
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/314:50 pmSTL - BIO
1 stop13h 15mUnited Airlines
Fri 11/76:40 amBIO - STL
1 stop14h 15mUnited Airlines
Deal found 8/12$645

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Bilbao 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 August 14, 2025.
Use the filters below to find and compare flights from St. Louis to Bilbao that are best for you.

Fly from

St. Louis

Fly to

Bilbao

Route

Depart

Return

Price

St. LouisBilbao

STL - BIO

STLBIO

Lambert-St Louis

Sun 10/5

12:25 pm-11:05 am

2 stops15h 40m

Bilbao

Wed 10/15

6:45 am-1:30 pm

1 stop13h 45m

$595

St. LouisBilbao

STL - BIO

STLBIO

Lambert-St Louis

Sun 10/5

9:56 am-12:45 pm

2 stops19h 49m

Bilbao

Wed 10/15

1:30 pm-11:54 pm

2 stops17h 24m

$604

St. LouisBilbao

STL - BIO

STLBIO

Lambert-St Louis

Sun 10/5

8:03 pm-8:50 pm

2 stops17h 47m

Bilbao

Wed 10/15

9:15 am-7:23 pm

2 stops17h 08m

$604

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Best time to book a flight from St. Louis to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from St. Louis 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 St. Louis to Bilbao

What is the cheapest time of day to fly from STL to BIO?

Find hourly flight availability from St. Louis to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 7% on flights from St. Louis to Bilbao by exploring options for tickets at noon.

Related info for your journey

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

  • Can I find deals for flights from St. Louis to Bilbao that include hotel bookings?

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

  • How can I find direct flights from St. Louis to Bilbao?

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

  • Can I find deals for business class flights from St. Louis to Bilbao?

    Yes. Cheapflights offers flight deals from St. Louis to Bilbao 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 St. Louis to Bilbao?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Bilbao (average of $541). Flying from St. Louis to Bilbao in June is currently the most expensive (average of $1,139). 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

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