What is the cheapest airline that flies from Lambert-St Louis to Spain?

American Airlines, British Airways, and KLM are the most popular carriers operating from Lambert-St Louis to Spain

What airlines fly to Spain?

United Airlines, American Airlines and Air Canada are the top three most popular airlines that fly to Spain from St. Louis according to our data. United Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Spain. Keep in mind that there are 8 different airlines that fly to Spain on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Spain?

Prices for flights from Lambert-St Louis Airport to Spain were last updated today.

How many operators does momondo search for flights from Lambert-St Louis Airport to Spain?

As of March 2026, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Spain.

How old do you have to be to fly from Lambert-St Louis Airport to Spain?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Spain.

What documentation or ID do you need to fly to Spain?

The travel and health documents required for your trip to Spain can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Spain. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$355 Cheap Flights from St. Louis to Spain in 2026

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Find the cheapest flights from St. Louis to Spain

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:30 am - 8:05 am

STL

MAD

16h 35m

1 stop

12:45 pm - 9:52 pm

MAD

STL

40h 07m

2 stops

$626United Airlines

Tue, Apr 14 - Wed, Apr 22

9:10 am - 8:05 am

STL

MAD

15h 55m

2 stops

12:45 pm - 9:52 pm

MAD

STL

40h 07m

2 stops

$630United Airlines

Tue, Apr 14 - Wed, Apr 22

2:40 pm - 12:05 am

STL

VLC

50h 25m

2 stops

6:00 am - 1:55 pm

VLC

STL

14h 55m

1 stop

$632Multiple Airlines

Sat, Aug 8 - Fri, Dec 11

2:33 pm - 8:20 am

STL

MAD

10h 47m

1 stop

1:00 pm - 10:59 pm

MAD

STL

16h 59m

1 stop

$634Iberia

Wed, Apr 22 - Wed, Apr 29

4:32 pm - 5:30 am

STL

MAD

29h 58m

1 stop

3:25 pm - 11:38 pm

MAD

STL

15h 13m

1 stop

$636British Airways

Sat, Aug 15 - Sat, Sep 12

2:33 pm - 12:05 pm

STL

BCN

14h 32m

2 stops

10:45 am - 7:30 pm

BCN

STL

15h 45m

1 stop

$640British Airways

Mon, Apr 13 - Wed, Apr 29

5:32 pm - 12:15 am

STL

VLC

47h 43m

2 stops

6:05 am - 8:21 pm

VLC

STL

21h 16m

2 stops

$650Iberia

Sat, Aug 8 - Fri, Dec 11

9:10 am - 8:30 am

STL

BIO

16h 20m

2 stops

9:15 am - 7:33 pm

BIO

STL

17h 18m

2 stops

$809American Airlines

Thu, Apr 23 - Thu, Apr 30

8:03 pm - 7:35 pm

STL

TFN

17h 32m

2 stops

6:50 am - 7:33 pm

TFN

STL

18h 43m

2 stops

$816American Airlines

Mon, Apr 13 - Wed, Apr 29

7:45 am - 11:10 am

STL

BIO

20h 25m

3 stops

6:50 am - 3:25 pm

BIO

STL

15h 35m

2 stops

$955Air Canada

Tue, Apr 14 - Wed, Apr 22

United Airlines flights from St. Louis to Spain

Our best United Airlines deals on St. Louis to Spain flight tickets

United Airlines

Apr 14

STL8:30 amLambert-St Louis

16h 35m

1 stop

MAD8:05 amMadrid Barajas

Apr 22

MAD12:45 pmMadrid Barajas

40h 07m

2 stops

STL9:52 pmLambert-St Louis

$626

United Airlines

Apr 14

STL9:10 amLambert-St Louis

15h 55m

2 stops

MAD8:05 amMadrid Barajas

Apr 22

MAD12:45 pmMadrid Barajas

40h 07m

2 stops

STL9:52 pmLambert-St Louis

$630

United Airlines

Apr 19

STL6:30 amLambert-St Louis

23h 45m

1 stop

BCN1:15 pmBarcelona-El Prat

Apr 30

BCN1:15 pmBarcelona-El Prat

29h 51m

1 stop

STL12:06 pmLambert-St Louis

$639

British Airways flights from St. Louis to Spain

Our best British Airways deals on St. Louis to Spain flight tickets

British Airways

Aug 15

STL4:32 pmLambert-St Louis

29h 58m

1 stop

MAD5:30 amMadrid Barajas

Sep 12

MAD3:25 pmMadrid Barajas

15h 13m

1 stop

STL11:38 pmLambert-St Louis

$636

British Airways

Apr 13

STL2:33 pmLambert-St Louis

14h 32m

2 stops

BCN12:05 pmBarcelona-El Prat

Apr 29

BCN10:45 amBarcelona-El Prat

15h 45m

1 stop

STL7:30 pmLambert-St Louis

$640

British Airways

Apr 14

STL8:03 pmLambert-St Louis

10h 27m

1 stop

MAD1:30 pmMadrid Barajas

Apr 22

MAD1:00 pmMadrid Barajas

16h 59m

1 stop

STL10:59 pmLambert-St Louis

$641

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Tue 4/14

8:30 am-8:05 am

1 stop16h 35m

Madrid Barajas

Wed 4/22

12:45 pm-9:52 pm

2 stops40h 07m

$626

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Tue 4/14

9:10 am-8:05 am

2 stops15h 55m

Madrid Barajas

Wed 4/22

12:45 pm-9:52 pm

2 stops40h 07m

$630

St. LouisValencia

STL - VLC

STLVLC

Lambert-St Louis

Sat 8/8

2:40 pm-12:05 am

2 stops50h 25m

Valencia

Fri 12/11

6:00 am-1:55 pm

1 stop14h 55m

$632

Quickest round-trip

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 4/22

2:33 pm-8:20 am

1 stop10h 47m

Madrid Barajas

Wed 4/29

1:00 pm-10:59 pm

1 stop16h 59m

$634

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sat 8/15

4:32 pm-5:30 am

1 stop29h 58m

Madrid Barajas

Sat 9/12

3:25 pm-11:38 pm

1 stop15h 13m

$636

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

2:33 pm-12:05 pm

2 stops14h 32m

Barcelona-El Prat

Wed 4/29

10:45 am-7:30 pm

1 stop15h 45m

$640

St. LouisValencia

STL - VLC

STLVLC

Lambert-St Louis

Sat 8/8

5:32 pm-12:15 am

2 stops47h 43m

Valencia

Fri 12/11

6:05 am-8:21 pm

2 stops21h 16m

$650

St. LouisBilbao

STL - BIO

STLBIO

Lambert-St Louis

Thu 4/23

9:10 am-8:30 am

2 stops16h 20m

Bilbao

Thu 4/30

9:15 am-7:33 pm

2 stops17h 18m

$809

St. LouisSanta Cruz de Tenerife

STL - TFN

STLTFN

Lambert-St Louis

Mon 4/13

8:03 pm-7:35 pm

2 stops17h 32m

Santa Cruz de Tenerife Tenerife-Norte

Wed 4/29

6:50 am-7:33 pm

2 stops18h 43m

$816

St. LouisBilbao

STL - BIO

STLBIO

Lambert-St Louis

Tue 4/14

7:45 am-11:10 am

3 stops20h 25m

Bilbao

Wed 4/22

6:50 am-3:25 pm

2 stops15h 35m

$955

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Spain

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Spain?

If you don’t want to visit Spain in January, then you should wait until November to fly from St. Louis, when ticket prices are also cheap, with an average price of $663.

How far in advance should I book a flight to Spain?

You are more likely to see cheaper flights to Spain from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Spain for around $855 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Spain from St. Louis for as low as $628 on momondo.

Can stopping save me money on St. Louis to Spain flights?

You could potentially save up to 24% on your flight if you consider stops on a St. Louis to Spain flight.

Cheap St. Louis to Spain flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Spain

Fastest flight time	10h 45m
Direct flights	None

The fastest flight from St. Louis to Spain takes 10h 45m

There are no direct flights from St. Louis to Spain. There are no popular flight routes from St. Louis to Spain.

Search flight deals

When did momondo last update prices for flights from Lambert-St Louis Airport to Spain?
Prices for flights from Lambert-St Louis Airport to Spain were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to Spain?
As of March 2026, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Spain.
How old do you have to be to fly from Lambert-St Louis Airport to Spain?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Spain.
What documentation or ID do you need to fly to Spain?
The travel and health documents required for your trip to Spain can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Spain. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from St. Louis to Spain

Compare and see reviews for airlines that fly from St. Louis to Spain with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $480	Free Cancellation	Rating 6.8 7,843 reviews	Search Lufthansa flights
British Airways	PriceFrom $516	Free Cancellation	Rating 6.7 7,781 reviews	Search British Airways flights
Iberia	PriceFrom $552	Free Cancellation	Rating 7.0 3,133 reviews	Search Iberia flights
Delta	PriceFrom $552	Free Cancellation	Rating 7.9 8,277 reviews	Search Delta flights
United Airlines	PriceFrom $560	Free Cancellation	Rating 7.4 9,414 reviews	Search United Airlines flights
American Airlines	PriceFrom $582	Free Cancellation	Rating 7.1 11,420 reviews	Search American Airlines flights
Air Canada	PriceFrom $593	Free Cancellation	Rating 7.1 10,800 reviews	Search Air Canada flights
KLM	PriceFrom $634	Free Cancellation	Rating 7.8 1,469 reviews	Search KLM flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Spain?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Spain. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Spain with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Spain from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Spain?

Once you have performed a search for St. Louis to Spain flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Spain right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Spain from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.