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Cheap flights from San Juan Luis Munoz Marin Intl Airport to St. Louis from $117

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Juan Luis Munoz Marin Intl Airport to St. Louis departing on 9/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Juan Luis Munoz Marin Intl Airport to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
5:20 pm - 5:37 pm
SJU
-
STL
25h 17m
1 stop
Frontier Logo
4:57 pm - 12:56 am
STL
-
SJU
30h 59m
2 stops
$296Frontier
Wed, Aug 12 - Mon, Aug 17
Frontier Logo
4:30 pm - 9:40 am
SJU
-
STL
18h 10m
1 stop
Frontier Logo
10:35 am - 11:57 pm
STL
-
SJU
12h 22m
2 stops
$319Frontier
Thu, Oct 1 - Mon, Oct 5
Frontier Logo
6:26 am - 8:57 am
SJU
-
STL
27h 31m
2 stops
Frontier Logo
4:57 pm - 2:16 pm
STL
-
SJU
20h 19m
1 stop
$322Frontier
Tue, Aug 11 - Sat, Aug 15
Frontier Logo
6:26 am - 8:57 am
SJU
-
STL
27h 31m
2 stops
Frontier Logo
6:17 pm - 2:16 pm
STL
-
SJU
18h 59m
1 stop
$323Frontier
Sun, Aug 16 - Sun, Aug 23
Frontier Logo
6:26 am - 8:57 am
SJU
-
STL
27h 31m
2 stops
Frontier Logo
6:34 pm - 2:16 pm
STL
-
SJU
18h 42m
1 stop
$324Frontier
Tue, Aug 11 - Sun, Aug 16
Frontier Logo
6:00 am - 5:37 pm
SJU
-
STL
12h 37m
2 stops
Frontier Logo
6:17 pm - 2:16 pm
STL
-
SJU
18h 59m
1 stop
$325Frontier
Thu, Aug 13 - Sun, Aug 30
Frontier Logo
3:10 am - 5:37 pm
SJU
-
STL
15h 27m
2 stops
Frontier Logo
4:57 pm - 2:16 pm
STL
-
SJU
20h 19m
1 stop
$326Frontier
Mon, Aug 10 - Sat, Aug 15
Frontier Logo
8:37 pm - 5:37 pm
SJU
-
STL
22h 00m
2 stops
Frontier Logo
6:34 pm - 2:16 pm
STL
-
SJU
18h 42m
1 stop
$327Frontier
Wed, Aug 12 - Sun, Aug 16
Frontier Logo
3:10 am - 5:37 pm
SJU
-
STL
15h 27m
2 stops
Frontier Logo
4:57 pm - 2:16 pm
STL
-
SJU
20h 19m
1 stop
$328Frontier
Mon, Aug 10 - Mon, Aug 17
Frontier Logo
4:30 pm - 9:40 am
SJU
-
STL
18h 10m
1 stop
Frontier Logo
10:35 am - 11:38 pm
STL
-
SJU
36h 03m
2 stops
$329Frontier
Fri, Sep 25 - Fri, Oct 2

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American Airlines flights from San Juan Luis Munoz Marin Intl Airport to St. Louis

Our best American Airlines deals on San Juan Luis Munoz Marin Intl Airport to St. Louis flight tickets
American Airlines
Oct 20
SJU7:30 amSan Juan Luis Munoz Marin Intl
17h 07m
1 stop
STL11:37 pmLambert-St Louis
Oct 27
STL10:59 amLambert-St Louis
10h 23m
2 stops
SJU10:22 pmSan Juan Luis Munoz Marin Intl
$356
American Airlines
Sep 11
SJU2:58 pmSan Juan Luis Munoz Marin Intl
8h 44m
2 stops
STL10:42 pmLambert-St Louis
Sep 14
STL5:13 pmLambert-St Louis
16h 47m
2 stops
SJU11:00 amSan Juan Luis Munoz Marin Intl
$363
American Airlines
Sep 24
SJU4:19 pmSan Juan Luis Munoz Marin Intl
8h 24m
1 stop
STL11:43 pmLambert-St Louis
Sep 30
STL5:13 pmLambert-St Louis
15h 11m
2 stops
SJU9:24 amSan Juan Luis Munoz Marin Intl
$368

Frontier flights from San Juan Luis Munoz Marin Intl Airport to St. Louis

Our best Frontier deals on San Juan Luis Munoz Marin Intl Airport to St. Louis flight tickets
Frontier
Aug 12
SJU5:20 pmSan Juan Luis Munoz Marin Intl
25h 17m
1 stop
STL5:37 pmLambert-St Louis
Aug 17
STL4:57 pmLambert-St Louis
30h 59m
2 stops
SJU12:56 amSan Juan Luis Munoz Marin Intl
$296
Frontier
Sep 17
SJU9:03 amSan Juan Luis Munoz Marin Intl
11h 36m
1 stop
STL7:39 pmLambert-St Louis
Sep 21
STL10:35 amLambert-St Louis
36h 22m
2 stops
SJU11:57 pmSan Juan Luis Munoz Marin Intl
$316
Frontier
Oct 1
SJU4:30 pmSan Juan Luis Munoz Marin Intl
18h 10m
1 stop
STL9:40 amLambert-St Louis
Oct 5
STL10:35 amLambert-St Louis
12h 22m
2 stops
SJU11:57 pmSan Juan Luis Munoz Marin Intl
$319

momondo Fare Finder

 
Customize your flight search to find flights from San Juan Luis Munoz Marin Intl Airport to St. Louis 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, momondo users made 832,500 searches. Data last updated July 23, 2026.
Use the filters below to find and compare flights from San Juan Luis Munoz Marin Intl Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 8/12

5:20 pm-5:37 pm

1 stop25h 17m

Lambert-St Louis

Mon 8/17

4:57 pm-12:56 am

2 stops30h 59m

$296
Quickest round-trip

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 10/1

4:30 pm-9:40 am

1 stop18h 10m

Lambert-St Louis

Mon 10/5

10:35 am-11:57 pm

2 stops12h 22m

$319

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 8/11

6:26 am-8:57 am

2 stops27h 31m

Lambert-St Louis

Sat 8/15

4:57 pm-2:16 pm

1 stop20h 19m

$322

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Sun 8/16

6:26 am-8:57 am

2 stops27h 31m

Lambert-St Louis

Sun 8/23

6:17 pm-2:16 pm

1 stop18h 59m

$323

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 8/11

6:26 am-8:57 am

2 stops27h 31m

Lambert-St Louis

Sun 8/16

6:34 pm-2:16 pm

1 stop18h 42m

$324

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 8/13

6:00 am-5:37 pm

2 stops12h 37m

Lambert-St Louis

Sun 8/30

6:17 pm-2:16 pm

1 stop18h 59m

$325

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 8/10

3:10 am-5:37 pm

2 stops15h 27m

Lambert-St Louis

Sat 8/15

4:57 pm-2:16 pm

1 stop20h 19m

$326

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 8/12

8:37 pm-5:37 pm

2 stops22h 00m

Lambert-St Louis

Sun 8/16

6:34 pm-2:16 pm

1 stop18h 42m

$327

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 8/10

3:10 am-5:37 pm

2 stops15h 27m

Lambert-St Louis

Mon 8/17

4:57 pm-2:16 pm

1 stop20h 19m

$328

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 9/25

4:30 pm-9:40 am

1 stop18h 10m

Lambert-St Louis

Fri 10/2

10:35 am-11:38 pm

2 stops36h 03m

$329

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from San Juan Luis Munoz Marin Intl Airport to St. Louis

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

What is the typical price of a round-trip flight between San Juan Luis Munoz Marin Intl Airport and St. Louis?

What is the cheapest month to fly to St. Louis?

In general, January is the cheapest month to fly from San Juan Luis Munoz Marin Intl Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $248. The month of April is another great option to travel to St. Louis, with average flight prices from San Juan Luis Munoz Marin Intl Airport averaging around $346.

What is the cheapest San Juan Luis Munoz Marin Intl to Lambert-St Louis flight route?

Fly from San Juan Luis Munoz Marin Intl to Lambert-St Louis for the best San Juan Luis Munoz Marin Intl - Lambert-St Louis flight prices

How far in advance should I book a flight from San Juan Luis Munoz Marin Intl Airport to St. Louis?

You are more likely to see cheaper flights to St. Louis from San Juan Luis Munoz Marin Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $422 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from San Juan Luis Munoz Marin Intl Airport for as low as $168 on momondo.

What cabin class options are available on San Juan Luis Munoz Marin Intl Airport to St. Louis flights?

There is only 1 cabin class available to choose from on San Juan Luis Munoz Marin Intl Airport to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Juan Luis Munoz Marin Intl Airport to St. Louis flights?

No. A direct flight is the cheapest option for a flight between San Juan Luis Munoz Marin Intl Airport to St. Louis.

How have San Juan Luis Munoz Marin Intl Airport to St. Louis flight prices changed over time?

As of July 2026, prices for San Juan Luis Munoz Marin Intl Airport to St. Louis flights are approximately 33% more expensive when compared to flights at the same time last year.

When to book flights from San Juan Luis Munoz Marin Intl Airport to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from San Juan Luis Munoz Marin Intl Airport to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Juan Luis Munoz Marin Intl Airport to St. Louis (SJU to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan Luis Munoz Marin Intl Airport to St. Louis

Fastest flight time

5h 00m

Direct flights

Sun

Airports in St. Louis

1 airport
The fastest flight from San Juan Luis Munoz Marin Intl Airport to St. Louis takes 5h 00m
Direct flights go from San Juan Luis Munoz Marin Intl Airport to St. Louis on Sunday. The only airline offering direct flights is Southwest.
There is 1 airport in St. Louis. From San Juan Luis Munoz Marin Intl Airport there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from San Juan Luis Munoz Marin Intl Airport to St. Louis

  • How far is San Juan Luis Munoz Marin Intl to Lambert-St Louis by plane?

    The distance between San Juan Luis Munoz Marin Intl and Lambert-St Louis is about 2011.8 mi. A reasonable flight in good conditions will take 5h 00m.

  • When did momondo last update prices for flights from San Juan Luis Munoz Marin Intl Airport to Lambert-St Louis Airport?

    Prices for flights from San Juan Luis Munoz Marin Intl Airport to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from San Juan Luis Munoz Marin Intl Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from San Juan Luis Munoz Marin Intl Airport to Lambert-St Louis Airport?

    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 San Juan Luis Munoz Marin Intl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport 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 Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from San Juan Luis Munoz Marin Intl Airport to St. Louis?

  • What is the most popular airline from San Juan Luis Munoz Marin Intl Airport to St. Louis?

Best airlines flying from San Juan Luis Munoz Marin Intl Airport to St. Louis

Compare and see reviews for airlines that fly from San Juan Luis Munoz Marin Intl Airport to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $84Free CancellationRating
5.6
2,770 reviews
Search Frontier flights
DeltaPriceFrom $205Free CancellationRating
7.8
8,479 reviews
Search Delta flights
American AirlinesPriceFrom $225Free CancellationRating
7.1
11,834 reviews
Search American Airlines flights
SouthwestPriceFrom $336Free CancellationRating
8.0
4,238 reviews
Search Southwest flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Collinsville
St. Peters
Florissant
Maryland Heights
O'Fallon
Alton
Farmington
Clayton
Wentzville
Fenton
Festus
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from San Juan.

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

Yes. momondo allows you to filter the results for San Juan to St. Louis flights to just show those with flexible booking policies.

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

Once all potential San Juan to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to St. Louis from San Juan are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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