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Cheap flights from San Juan Luis Munoz Marin Intl Airport to St. Louis from $101

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.
1 adult
1 adult, Economy, 0 bags

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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
7:25 am - 1:22 pm
SJU
-
STL
6h 57m
1 stop
American Airlines Logo
6:29 am - 10:05 pm
STL
-
SJU
14h 36m
1 stop
$242American Airlines
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
3:19 pm - 11:19 pm
SJU
-
STL
9h 00m
1 stop
Frontier Logo
4:59 pm - 2:01 am
STL
-
SJU
8h 02m
1 stop
$243Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
6:09 pm - 12:21 am
SJU
-
STL
7h 12m
1 stop
Frontier Logo
4:19 pm - 2:08 am
STL
-
SJU
8h 49m
1 stop
$250Frontier
Fri, May 8 - Mon, May 11
American Airlines Logo
7:00 pm - 10:16 am
SJU
-
STL
16h 16m
1 stop
American Airlines Logo
5:15 am - 9:59 pm
STL
-
SJU
15h 44m
1 stop
$274American Airlines
Tue, May 19 - Tue, Jun 2
Frontier Logo
3:19 pm - 11:19 pm
SJU
-
STL
9h 00m
1 stop
Frontier Logo
4:59 pm - 9:54 am
STL
-
SJU
15h 55m
1 stop
$275Frontier
Thu, Apr 16 - Sun, Apr 19
American Airlines Logo
7:00 pm - 10:16 am
SJU
-
STL
16h 16m
1 stop
American Airlines Logo
7:05 am - 6:10 pm
STL
-
SJU
10h 05m
2 stops
$282American Airlines
Thu, May 14 - Tue, May 19
Frontier Logo
4:14 pm - 6:50 am
SJU
-
STL
39h 36m
2 stops
Frontier Logo
5:27 pm - 2:08 pm
STL
-
SJU
19h 41m
1 stop
$291Frontier
Thu, Apr 30 - Sat, May 9
Southwest Logo
2:00 pm - 11:40 pm
SJU
-
STL
10h 40m
1 stop
Southwest Logo
10:55 am - 7:05 pm
STL
-
SJU
7h 10m
1 stop
$296Southwest
Thu, Apr 30 - Sat, May 9
Multiple Airlines Logo
9:54 am - 8:55 am
SJU
-
STL
24h 01m
1 stop
Multiple Airlines Logo
5:27 pm - 5:26 pm
STL
-
SJU
22h 59m
2 stops
$297Multiple Airlines
Fri, May 8 - Mon, May 11
Frontier Logo
3:16 am - 11:25 pm
SJU
-
STL
21h 09m
1 stop
Frontier Logo
4:19 pm - 2:08 am
STL
-
SJU
8h 49m
1 stop
$299Frontier
Fri, Apr 10 - Sat, May 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
Apr 16
SJU3:19 pmSan Juan Luis Munoz Marin Intl
9h 00m
1 stop
STL11:19 pmLambert-St Louis
Apr 19
STL4:59 pmLambert-St Louis
8h 02m
1 stop
SJU2:01 amSan Juan Luis Munoz Marin Intl
$243
Frontier
May 8
SJU6:09 pmSan Juan Luis Munoz Marin Intl
7h 12m
1 stop
STL12:21 amLambert-St Louis
May 11
STL4:19 pmLambert-St Louis
8h 49m
1 stop
SJU2:08 amSan Juan Luis Munoz Marin Intl
$250
Frontier
Apr 16
SJU3:19 pmSan Juan Luis Munoz Marin Intl
9h 00m
1 stop
STL11:19 pmLambert-St Louis
Apr 19
STL4:59 pmLambert-St Louis
15h 55m
1 stop
SJU9:54 amSan Juan Luis Munoz Marin Intl
$275

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
SJU7:25 amSan Juan Luis Munoz Marin Intl
6h 57m
1 stop
STL1:22 pmLambert-St Louis
Apr 19
STL6:29 amLambert-St Louis
14h 36m
1 stop
SJU10:05 pmSan Juan Luis Munoz Marin Intl
$242
American Airlines
May 19
SJU7:00 pmSan Juan Luis Munoz Marin Intl
16h 16m
1 stop
STL10:16 amLambert-St Louis
Jun 2
STL5:15 amLambert-St Louis
15h 44m
1 stop
SJU9:59 pmSan Juan Luis Munoz Marin Intl
$274
American Airlines
May 14
SJU7:00 pmSan Juan Luis Munoz Marin Intl
16h 16m
1 stop
STL10:16 amLambert-St Louis
May 19
STL7:05 amLambert-St Louis
10h 05m
2 stops
SJU6:10 pmSan Juan Luis Munoz Marin Intl
$282

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 March 14, 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

Thu 4/16

7:25 am-1:22 pm

1 stop6h 57m

Lambert-St Louis

Sun 4/19

6:29 am-10:05 pm

1 stop14h 36m

$242

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/16

3:19 pm-11:19 pm

1 stop9h 00m

Lambert-St Louis

Sun 4/19

4:59 pm-2:01 am

1 stop8h 02m

$243
Quickest round-trip

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 5/8

6:09 pm-12:21 am

1 stop7h 12m

Lambert-St Louis

Mon 5/11

4:19 pm-2:08 am

1 stop8h 49m

$250

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 5/19

7:00 pm-10:16 am

1 stop16h 16m

Lambert-St Louis

Tue 6/2

5:15 am-9:59 pm

1 stop15h 44m

$274

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/16

3:19 pm-11:19 pm

1 stop9h 00m

Lambert-St Louis

Sun 4/19

4:59 pm-9:54 am

1 stop15h 55m

$275

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 5/14

7:00 pm-10:16 am

1 stop16h 16m

Lambert-St Louis

Tue 5/19

7:05 am-6:10 pm

2 stops10h 05m

$282

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/30

4:14 pm-6:50 am

2 stops39h 36m

Lambert-St Louis

Sat 5/9

5:27 pm-2:08 pm

1 stop19h 41m

$291

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/30

2:00 pm-11:40 pm

1 stop10h 40m

Lambert-St Louis

Sat 5/9

10:55 am-7:05 pm

1 stop7h 10m

$296

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 5/8

9:54 am-8:55 am

1 stop24h 01m

Lambert-St Louis

Mon 5/11

5:27 pm-5:26 pm

2 stops22h 59m

$297

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 4/10

3:16 am-11:25 pm

1 stop21h 09m

Lambert-St Louis

Sat 5/16

4:19 pm-2:08 am

1 stop8h 49m

$299

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 $403 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 March 2026, prices for San Juan Luis Munoz Marin Intl Airport to St. Louis flights are approximately 5% 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

6h 56m

Direct flights

Sun

Airports in St. Louis

1 airport
The fastest flight from San Juan Luis Munoz Marin Intl Airport to St. Louis takes 6h 56m
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 6h 56m.

  • 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
3,032 reviews
Search Frontier flights
DeltaPriceFrom $170Free CancellationRating
7.9
8,291 reviews
Search Delta flights
American AirlinesPriceFrom $225Free CancellationRating
7.1
11,464 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,317 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
Florissant
Maryland Heights
O'Fallon
Collinsville
St. Peters
Fenton
Alton
Wentzville
Farmington
Edwardsville
Festus
Clayton
Eureka
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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