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Cheap flights from San Juan Luis Munoz Marin Intl Airport to St. Louis from $108

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 11/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from San Juan Luis Munoz Marin Intl Airport to St. Louis

Cheap round-trip flights

Delta Logo
5:43 pm - 11:41 pmSJU-STL
6h 58m1 stop
Delta Logo
6:00 am - 4:33 pmSTL-SJU
9h 33m1 stop
$225Delta
Find Deal
Fri, Oct 24 - Mon, Oct 27
American Airlines Logo
11:56 am - 11:05 pmSJU-STL
12h 09m2 stops
American Airlines Logo
6:00 am - 11:52 pmSTL-SJU
15h 52m1 stop
$231American Airlines
Find Deal
Wed, Oct 29 - Mon, Nov 3
Frontier Logo
9:26 pm - 3:04 pmSJU-STL
18h 38m2 stops
Frontier Logo
7:55 pm - 2:11 pmSTL-SJU
17h 16m2 stops
$260Frontier
Find Deal
Wed, Oct 1 - Sat, Oct 4
Frontier Logo
9:26 pm - 3:04 pmSJU-STL
18h 38m2 stops
Frontier Logo
4:33 pm - 2:30 amSTL-SJU
8h 57m1 stop
$268Frontier
Find Deal
Wed, Oct 1 - Sat, Oct 11
Delta Logo
3:30 pm - 11:40 pmSJU-STL
10h 10m1 stop
Delta Logo
10:00 am - 8:30 pmSTL-SJU
8h 30m1 stop
$269Delta
Find Deal
Thu, Feb 19 - Mon, Feb 23
Frontier Logo
9:26 pm - 1:02 pmSJU-STL
16h 36m2 stops
Frontier Logo
4:33 pm - 2:30 amSTL-SJU
8h 57m1 stop
$273Frontier
Find Deal
Thu, Sep 25 - Sat, Oct 11
American Airlines Logo
4:45 pm - 9:27 amSJU-STL
18h 42m2 stops
American Airlines Logo
11:18 am - 10:35 pmSTL-SJU
9h 17m2 stops
$285American Airlines
Find Deal
Thu, Feb 19 - Mon, Feb 23
Southwest Logo
8:55 am - 7:15 pmSJU-STL
12h 20m1 stop
Southwest Logo
10:25 am - 6:40 pmSTL-SJU
6h 15m1 stop
$294Southwest
Find Deal
Tue, Nov 11 - Sat, Nov 15
United Airlines Logo
1:05 am - 10:49 amSJU-STL
10h 44m2 stops
United Airlines Logo
6:30 am - 2:40 pmSTL-SJU
7h 10m1 stop
$295United Airlines
Find Deal
Wed, Oct 22 - Sun, Oct 26
United Airlines Logo
1:05 am - 2:27 pmSJU-STL
14h 22m2 stops
United Airlines Logo
6:15 am - 3:42 pmSTL-SJU
8h 27m1 stop
$315United Airlines
Find Deal
Fri, Oct 17 - Tue, Oct 21

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 29
SJU11:56 amSan Juan Luis Munoz Marin Intl
12h 09m
2 stops
STL11:05 pmLambert-St Louis
Nov 3
STL6:00 amLambert-St Louis
15h 52m
1 stop
SJU11:52 pmSan Juan Luis Munoz Marin Intl
$231
Find similar
American Airlines
Feb 19
SJU4:45 pmSan Juan Luis Munoz Marin Intl
18h 42m
2 stops
STL9:27 amLambert-St Louis
Feb 23
STL11:18 amLambert-St Louis
9h 17m
2 stops
SJU10:35 pmSan Juan Luis Munoz Marin Intl
$285
Find similar
American Airlines
Oct 17
SJU3:00 pmSan Juan Luis Munoz Marin Intl
18h 09m
1 stop
STL8:09 amLambert-St Louis
Oct 20
STL6:00 amLambert-St Louis
16h 59m
1 stop
SJU11:59 pmSan Juan Luis Munoz Marin Intl
$298
Find similar

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
Oct 1
SJU9:26 pmSan Juan Luis Munoz Marin Intl
18h 38m
2 stops
STL3:04 pmLambert-St Louis
Oct 4
STL7:55 pmLambert-St Louis
17h 16m
2 stops
SJU2:11 pmSan Juan Luis Munoz Marin Intl
$260
Find similar
Frontier
Oct 1
SJU9:26 pmSan Juan Luis Munoz Marin Intl
18h 38m
2 stops
STL3:04 pmLambert-St Louis
Oct 11
STL4:33 pmLambert-St Louis
8h 57m
1 stop
SJU2:30 amSan Juan Luis Munoz Marin Intl
$268
Find similar
Frontier
Sep 25
SJU9:26 pmSan Juan Luis Munoz Marin Intl
16h 36m
2 stops
STL1:02 pmLambert-St Louis
Oct 11
STL4:33 pmLambert-St Louis
8h 57m
1 stop
SJU2:30 amSan Juan Luis Munoz Marin Intl
$273
Find similar

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 September 15, 2025.
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

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 10/24

5:43 pm-11:41 pm

1 stop6h 58m

Lambert-St Louis

Mon 10/27

6:00 am-4:33 pm

1 stop9h 33m

$225

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 10/29

11:56 am-11:05 pm

2 stops12h 09m

Lambert-St Louis

Mon 11/3

6:00 am-11:52 pm

1 stop15h 52m

$231

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 10/1

9:26 pm-3:04 pm

2 stops18h 38m

Lambert-St Louis

Sat 10/4

7:55 pm-2:11 pm

2 stops17h 16m

$260

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 10/1

9:26 pm-3:04 pm

2 stops18h 38m

Lambert-St Louis

Sat 10/11

4:33 pm-2:30 am

1 stop8h 57m

$268

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 2/19

3:30 pm-11:40 pm

1 stop10h 10m

Lambert-St Louis

Mon 2/23

10:00 am-8:30 pm

1 stop8h 30m

$269

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 9/25

9:26 pm-1:02 pm

2 stops16h 36m

Lambert-St Louis

Sat 10/11

4:33 pm-2:30 am

1 stop8h 57m

$273

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 2/19

4:45 pm-9:27 am

2 stops18h 42m

Lambert-St Louis

Mon 2/23

11:18 am-10:35 pm

2 stops9h 17m

$285

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 11/11

8:55 am-7:15 pm

1 stop12h 20m

Lambert-St Louis

Sat 11/15

10:25 am-6:40 pm

1 stop6h 15m

$294

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 10/22

1:05 am-10:49 am

2 stops10h 44m

Lambert-St Louis

Sun 10/26

6:30 am-2:40 pm

1 stop7h 10m

$295

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 10/17

1:05 am-2:27 pm

2 stops14h 22m

Lambert-St Louis

Tue 10/21

6:15 am-3:42 pm

1 stop8h 27m

$315

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 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 $286. 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 $326.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $349. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $695. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from San Juan Luis Munoz Marin Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $282 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $695 per ticket.

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 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 $397 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 $245 on momondo.

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

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

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

As of September 2025, prices for San Juan Luis Munoz Marin Intl Airport to St. Louis flights are approximately 16% cheaper 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 10m

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 10m
Direct flights go from San Juan Luis Munoz Marin Intl Airport to St. Louis on Sunday. There are no airlines offering direct flights.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • 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 6h 20m.

  • 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 $128Free CancellationRating
5.8
3,172 reviews
Search Frontier flights
DeltaPriceFrom $212Free CancellationRating
7.9
7,954 reviews
Search Delta flights
American AirlinesPriceFrom $254Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $255Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

  • Southwest Flights From San Juan Luis Munoz Marin Intl Airport to St. Louis

    Southwest flight deals from San Juan Luis Munoz Marin Intl Airport to St. Louis start from $342 round-trip. Over the 1 Southwest flight for this route in a normal week, average airfare is usually $610 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near St. Louis?

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