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Cheap flights from San Juan Luis Munoz Marin Intl Airport to St. Louis from $100

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 4/8. 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

Enter your travel dates to find the best prices.
Frontier Logo
5:25 pm - 12:27 am
SJU
-
STL
9h 02m
1 stop
Frontier Logo
3:49 pm - 2:53 am
STL
-
SJU
9h 04m
1 stop
$202Frontier
Fri, Feb 27 - Mon, Mar 2
Frontier Logo
5:25 pm - 11:59 pm
SJU
-
STL
8h 34m
1 stop
Frontier Logo
4:51 pm - 1:58 am
STL
-
SJU
8h 07m
1 stop
$220Frontier
Thu, Mar 5 - Mon, Mar 9
Frontier Logo
5:25 pm - 12:27 am
SJU
-
STL
9h 02m
1 stop
Frontier Logo
3:49 pm - 2:53 am
STL
-
SJU
9h 04m
1 stop
$223Frontier
Fri, Feb 27 - Mon, Mar 2
Frontier Logo
6:30 am - 11:19 pm
SJU
-
STL
17h 49m
1 stop
Frontier Logo
4:55 pm - 2:01 am
STL
-
SJU
8h 06m
1 stop
$234Frontier
Mon, Apr 20 - Sat, Apr 25
Frontier Logo
3:08 am - 7:37 am
SJU
-
STL
29h 29m
1 stop
Frontier Logo
4:51 pm - 8:54 am
STL
-
SJU
15h 03m
1 stop
$250Frontier
Mon, Mar 16 - Tue, Mar 24
American Airlines Logo
1:31 pm - 11:46 pm
SJU
-
STL
11h 15m
2 stops
American Airlines Logo
7:00 am - 8:51 pm
STL
-
SJU
12h 51m
1 stop
$256American Airlines
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
3:19 pm - 6:50 am
SJU
-
STL
16h 31m
2 stops
Frontier Logo
8:13 pm - 2:08 pm
STL
-
SJU
16h 55m
1 stop
$258Frontier
Tue, Apr 21 - Sat, Apr 25
Frontier Logo
3:08 am - 11:19 pm
SJU
-
STL
21h 11m
1 stop
Frontier Logo
4:54 pm - 10:53 am
STL
-
SJU
16h 59m
1 stop
$259Frontier
Mon, Mar 30 - Tue, Apr 7
Frontier Logo
3:18 pm - 6:50 am
SJU
-
STL
16h 32m
1 stop
Frontier Logo
11:21 am - 12:33 pm
STL
-
SJU
24h 12m
2 stops
$265Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
5:25 pm - 11:59 pm
SJU
-
STL
8h 34m
1 stop
Frontier Logo
4:51 pm - 1:58 am
STL
-
SJU
8h 07m
1 stop
$268Frontier
Thu, Mar 5 - Mon, Mar 9

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
Apr 16
SJU1:31 pmSan Juan Luis Munoz Marin Intl
11h 15m
2 stops
STL11:46 pmLambert-St Louis
Apr 19
STL7:00 amLambert-St Louis
12h 51m
1 stop
SJU8:51 pmSan Juan Luis Munoz Marin Intl
$256
American Airlines
Apr 23
SJU1:31 pmSan Juan Luis Munoz Marin Intl
11h 15m
2 stops
STL11:46 pmLambert-St Louis
Apr 27
STL7:05 amLambert-St Louis
10h 05m
2 stops
SJU6:10 pmSan Juan Luis Munoz Marin Intl
$263
American Airlines
Mar 17
SJU6:00 amSan Juan Luis Munoz Marin Intl
12h 40m
1 stop
STL5:40 pmLambert-St Louis
Mar 24
STL7:05 amLambert-St Louis
9h 06m
2 stops
SJU5:11 pmSan Juan Luis Munoz Marin Intl
$296

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
Feb 27
SJU5:25 pmSan Juan Luis Munoz Marin Intl
9h 02m
1 stop
STL12:27 amLambert-St Louis
Mar 2
STL3:49 pmLambert-St Louis
9h 04m
1 stop
SJU2:53 amSan Juan Luis Munoz Marin Intl
$202
Frontier
Mar 5
SJU5:25 pmSan Juan Luis Munoz Marin Intl
8h 34m
1 stop
STL11:59 pmLambert-St Louis
Mar 9
STL4:51 pmLambert-St Louis
8h 07m
1 stop
SJU1:58 amSan Juan Luis Munoz Marin Intl
$220
Frontier
Feb 27
SJU5:25 pmSan Juan Luis Munoz Marin Intl
9h 02m
1 stop
STL12:27 amLambert-St Louis
Mar 2
STL3:49 pmLambert-St Louis
9h 04m
1 stop
SJU2:53 amSan Juan Luis Munoz Marin Intl
$223

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 February 15, 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

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 2/27

5:25 pm-12:27 am

1 stop9h 02m

Lambert-St Louis

Mon 3/2

3:49 pm-2:53 am

1 stop9h 04m

$202

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 3/5

5:25 pm-11:59 pm

1 stop8h 34m

Lambert-St Louis

Mon 3/9

4:51 pm-1:58 am

1 stop8h 07m

$220

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 2/27

5:25 pm-12:27 am

1 stop9h 02m

Lambert-St Louis

Mon 3/2

3:49 pm-2:53 am

1 stop9h 04m

$223

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 4/20

6:30 am-11:19 pm

1 stop17h 49m

Lambert-St Louis

Sat 4/25

4:55 pm-2:01 am

1 stop8h 06m

$234

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 3/16

3:08 am-7:37 am

1 stop29h 29m

Lambert-St Louis

Tue 3/24

4:51 pm-8:54 am

1 stop15h 03m

$250

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/16

1:31 pm-11:46 pm

2 stops11h 15m

Lambert-St Louis

Sun 4/19

7:00 am-8:51 pm

1 stop12h 51m

$256

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 4/21

3:19 pm-6:50 am

2 stops16h 31m

Lambert-St Louis

Sat 4/25

8:13 pm-2:08 pm

1 stop16h 55m

$258

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 3/30

3:08 am-11:19 pm

1 stop21h 11m

Lambert-St Louis

Tue 4/7

4:54 pm-10:53 am

1 stop16h 59m

$259

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/16

3:18 pm-6:50 am

1 stop16h 32m

Lambert-St Louis

Sun 4/19

11:21 am-12:33 pm

2 stops24h 12m

$265

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 3/5

5:25 pm-11:59 pm

1 stop8h 34m

Lambert-St Louis

Mon 3/9

4:51 pm-1:58 am

1 stop8h 07m

$268

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 September is another great option to travel to St. Louis, with average flight prices from San Juan Luis Munoz Marin Intl Airport averaging around $298.

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 $402 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 $269 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.

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 February 2026, prices for San Juan Luis Munoz Marin Intl Airport to St. Louis flights are approximately 10% 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

7h 28m

Direct flights

Sun

Airports in St. Louis

1 airport
The fastest flight from San Juan Luis Munoz Marin Intl Airport to St. Louis takes 7h 28m
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 in St. Louis. From San Juan Luis Munoz Marin Intl Airport there are direct flights to 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 7h 28m.

  • 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
5.7
3,047 reviews
Search Frontier flights
DeltaPriceFrom $170Free CancellationRating
7.9
8,204 reviews
Search Delta flights
American AirlinesPriceFrom $225Free CancellationRating
7.2
11,292 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,285 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 $595 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
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
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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