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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 12/6. 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.
American Airlines Logo
6:25 am - 9:00 pmSJU-STL
16h 35m1 stop
American Airlines Logo
5:00 am - 8:58 pmSTL-SJU
13h 58m1 stop
$229American Airlines
Find Deal
vie., nov. 14 - dom., nov. 16
Southwest Logo
4:40 pm - 10:00 pmSJU-STL
7h 20m1 stop
Southwest Logo
8:15 am - 9:30 pmSTL-SJU
11h 15m1 stop
$269Southwest
Find Deal
jue., dic. 4 - lun., dic. 8
Frontier Logo
9:32 pm - 8:45 amSJU-STL
13h 13m1 stop
Frontier Logo
5:11 pm - 2:50 amSTL-SJU
7h 39m1 stop
$278Frontier
Find Deal
jue., dic. 4 - lun., dic. 8
Frontier Logo
11:05 am - 10:33 pmSJU-STL
13h 28m1 stop
Frontier Logo
5:11 pm - 2:50 amSTL-SJU
7h 39m1 stop
$281Frontier
Find Deal
mar., ene. 20 - vie., ene. 23
Frontier Logo
12:29 pm - 1:17 pmSJU-STL
25h 48m1 stop
Frontier Logo
2:12 pm - 11:19 amSTL-SJU
19h 07m1 stop
$284Frontier
Find Deal
mié., oct. 29 - dom., nov. 2
American Airlines Logo
5:41 am - 10:29 amSJU-STL
6h 48m1 stop
American Airlines Logo
7:01 pm - 9:36 amSTL-SJU
12h 35m2 stops
$285American Airlines
Find Deal
jue., feb. 19 - lun., feb. 23
Frontier Logo
3:59 am - 9:40 amSJU-STL
7h 41m1 stop
Frontier Logo
2:12 pm - 2:54 amSTL-SJU
10h 42m1 stop
$296Frontier
Find Deal
dom., nov. 2 - jue., nov. 6
Southwest Logo
9:40 am - 7:30 pmSJU-STL
11h 50m1 stop
Southwest Logo
1:50 pm - 12:35 amSTL-SJU
8h 45m2 stops
$298Southwest
Find Deal
jue., dic. 4 - lun., dic. 8
United Airlines Logo
2:05 am - 12:15 pmSJU-STL
12h 10m2 stops
United Airlines Logo
10:00 am - 9:00 pmSTL-SJU
9h 00m1 stop
$315United Airlines
Find Deal
mié., dic. 3 - lun., dic. 8
United Airlines Logo
2:05 am - 2:24 pmSJU-STL
14h 19m2 stops
United Airlines Logo
6:30 am - 3:40 pmSTL-SJU
7h 10m1 stop
$359United Airlines
Find Deal
jue., nov. 13 - dom., nov. 16

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
Dec 4
SJU9:32 pmSan Juan Luis Munoz Marin Intl
13h 13m
1 stop
STL8:45 amLambert-St Louis
Dec 8
STL5:11 pmLambert-St Louis
7h 39m
1 stop
SJU2:50 amSan Juan Luis Munoz Marin Intl
$278
Find similar
Frontier
Jan 20
SJU11:05 amSan Juan Luis Munoz Marin Intl
13h 28m
1 stop
STL10:33 pmLambert-St Louis
Jan 23
STL5:11 pmLambert-St Louis
7h 39m
1 stop
SJU2:50 amSan Juan Luis Munoz Marin Intl
$281
Find similar
Frontier
Oct 29
SJU12:29 pmSan Juan Luis Munoz Marin Intl
25h 48m
1 stop
STL1:17 pmLambert-St Louis
Nov 2
STL2:12 pmLambert-St Louis
19h 07m
1 stop
SJU11:19 amSan Juan Luis Munoz Marin Intl
$284
Find similar

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
Nov 14
SJU6:25 amSan Juan Luis Munoz Marin Intl
16h 35m
1 stop
STL9:00 pmLambert-St Louis
Nov 16
STL5:00 amLambert-St Louis
13h 58m
1 stop
SJU8:58 pmSan Juan Luis Munoz Marin Intl
$229
Find similar
American Airlines
Feb 19
SJU5:41 amSan Juan Luis Munoz Marin Intl
6h 48m
1 stop
STL10:29 amLambert-St Louis
Feb 23
STL7:01 pmLambert-St Louis
12h 35m
2 stops
SJU9:36 amSan Juan Luis Munoz Marin Intl
$285
Find similar
American Airlines
Dec 4
SJU2:36 pmSan Juan Luis Munoz Marin Intl
8h 52m
2 stops
STL9:28 pmLambert-St Louis
Dec 7
STL6:53 pmLambert-St Louis
16h 08m
1 stop
SJU1:01 pmSan Juan Luis Munoz Marin Intl
$303
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 octubre 14, 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

vie. 11/14

6:25 am-9:00 pm

1 stop16h 35m

Lambert-St Louis

dom. 11/16

5:00 am-8:58 pm

1 stop13h 58m

$229

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 12/4

4:40 pm-10:00 pm

1 stop7h 20m

Lambert-St Louis

lun. 12/8

8:15 am-9:30 pm

1 stop11h 15m

$269

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 12/4

9:32 pm-8:45 am

1 stop13h 13m

Lambert-St Louis

lun. 12/8

5:11 pm-2:50 am

1 stop7h 39m

$278

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

mar. 1/20

11:05 am-10:33 pm

1 stop13h 28m

Lambert-St Louis

vie. 1/23

5:11 pm-2:50 am

1 stop7h 39m

$281

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

mié. 10/29

12:29 pm-1:17 pm

1 stop25h 48m

Lambert-St Louis

dom. 11/2

2:12 pm-11:19 am

1 stop19h 07m

$284

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 2/19

5:41 am-10:29 am

1 stop6h 48m

Lambert-St Louis

lun. 2/23

7:01 pm-9:36 am

2 stops12h 35m

$285

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

dom. 11/2

3:59 am-9:40 am

1 stop7h 41m

Lambert-St Louis

jue. 11/6

2:12 pm-2:54 am

1 stop10h 42m

$296

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 12/4

9:40 am-7:30 pm

1 stop11h 50m

Lambert-St Louis

lun. 12/8

1:50 pm-12:35 am

2 stops8h 45m

$298

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

mié. 12/3

2:05 am-12:15 pm

2 stops12h 10m

Lambert-St Louis

lun. 12/8

10:00 am-9:00 pm

1 stop9h 00m

$315

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 11/13

2:05 am-2:24 pm

2 stops14h 19m

Lambert-St Louis

dom. 11/16

6:30 am-3:40 pm

1 stop7h 10m

$359

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 $280. 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 $300.

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 $624. 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 $624 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 $389 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 $210 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 October 2025, prices for San Juan Luis Munoz Marin Intl Airport to St. Louis flights are approximately 19% 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

Best Price Found

$273

Fastest flight time

5h 10m

Direct flights

Sun

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from San Juan Luis Munoz Marin Intl Airport in the past 72 hours is $273. The best round-trip flight deal from San Juan Luis Munoz Marin Intl Airport to St. Louis found on momondo in the last 72 hours is $583.
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. The only airline offering direct flights is Southwest.
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 37m.

  • 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
3,135 reviews
Search Frontier flights
DeltaPriceFrom $205Free CancellationRating
7.9
7,975 reviews
Search Delta flights
American AirlinesPriceFrom $254Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
United AirlinesPriceFrom $255Free CancellationRating
7.4
8,976 reviews
Search United Airlines flights
SouthwestPriceFrom $342Free 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
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Collinsville
Fenton
St. Peters
Alton
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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