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Cheap flights from Puerto Rico to St. Louis from $90

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Puerto Rico to St. Louis departing on 8/26. 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 Puerto Rico to St. Louis

Recent round-trip flight deals from Puerto Rico to St. Louis

Enter your travel dates to find the best prices.
American Airlines Logo
6:00 am - 10:40 pm
SJU
-
STL
17h 40m
1 stop
American Airlines Logo
6:00 am - 11:15 pm
STL
-
SJU
16h 15m
1 stop
$180American Airlines
Thu, Aug 13 - Mon, Aug 24
American Airlines Logo
7:00 am - 11:34 pm
SJU
-
STL
17h 34m
1 stop
American Airlines Logo
6:00 am - 6:34 pm
STL
-
SJU
11h 34m
2 stops
$252American Airlines
Thu, Aug 13 - Mon, Aug 24
American Airlines Logo
7:24 pm - 10:45 am
SJU
-
STL
16h 21m
1 stop
American Airlines Logo
5:42 am - 2:54 pm
STL
-
SJU
8h 12m
1 stop
$257American Airlines
Wed, Aug 12 - Sat, Aug 15
American Airlines Logo
2:33 pm - 11:34 pm
SJU
-
STL
10h 01m
1 stop
American Airlines Logo
6:54 am - 11:59 pm
STL
-
SJU
16h 05m
1 stop
$308American Airlines
Thu, Sep 3 - Mon, Sep 7
American Airlines Logo
10:16 am - 10:42 pm
SJU
-
STL
13h 26m
2 stops
American Airlines Logo
8:05 pm - 1:45 pm
STL
-
SJU
16h 40m
1 stop
$324American Airlines
Fri, Oct 2 - Mon, Oct 5
American Airlines Logo
3:47 pm - 12:14 am
SJU
-
STL
9h 27m
2 stops
American Airlines Logo
6:00 am - 6:34 pm
STL
-
SJU
11h 34m
2 stops
$328American Airlines
Thu, Aug 13 - Mon, Aug 24
American Airlines Logo
7:00 am - 11:34 pm
SJU
-
STL
17h 34m
1 stop
American Airlines Logo
5:42 am - 4:57 pm
STL
-
SJU
10h 15m
2 stops
$330American Airlines
Wed, Aug 12 - Sat, Aug 15
Southwest Logo
6:30 am - 2:55 pm
SJU
-
STL
9h 25m
1 stop
Southwest Logo
4:55 pm - 11:50 pm
STL
-
SJU
5h 55m
1 stop
$331Southwest
Thu, Sep 3 - Thu, Sep 3
American Airlines Logo
4:53 pm - 10:40 pm
SJU
-
STL
6h 47m
1 stop
American Airlines Logo
10:44 am - 9:55 pm
STL
-
SJU
10h 11m
2 stops
$336American Airlines
Thu, Aug 13 - Tue, Aug 25
American Airlines Logo
7:30 am - 10:40 pm
SJU
-
STL
16h 10m
1 stop
American Airlines Logo
5:42 am - 2:54 pm
STL
-
SJU
8h 12m
1 stop
$343American Airlines
Fri, Aug 21 - Tue, Aug 25

American Airlines flights from Puerto Rico to St. Louis

Our best American Airlines deals on Puerto Rico to St. Louis flight tickets
American Airlines
Aug 13
SJU6:00 amSan Juan Luis Munoz Marin Intl
17h 40m
1 stop
STL10:40 pmLambert-St Louis
Aug 24
STL6:00 amLambert-St Louis
16h 15m
1 stop
SJU11:15 pmSan Juan Luis Munoz Marin Intl
$180
American Airlines
Aug 13
SJU7:00 amSan Juan Luis Munoz Marin Intl
17h 34m
1 stop
STL11:34 pmLambert-St Louis
Aug 24
STL6:00 amLambert-St Louis
11h 34m
2 stops
SJU6:34 pmSan Juan Luis Munoz Marin Intl
$252
American Airlines
Aug 12
SJU7:24 pmSan Juan Luis Munoz Marin Intl
16h 21m
1 stop
STL10:45 amLambert-St Louis
Aug 15
STL5:42 amLambert-St Louis
8h 12m
1 stop
SJU2:54 pmSan Juan Luis Munoz Marin Intl
$257

Frontier flights from Puerto Rico to St. Louis

Our best Frontier deals on Puerto Rico to St. Louis flight tickets
Frontier
Jul 1
SJU3:06 amSan Juan Luis Munoz Marin Intl
21h 43m
1 stop
STL11:49 pmLambert-St Louis
Aug 12
STL4:09 pmLambert-St Louis
9h 06m
1 stop
SJU2:15 amSan Juan Luis Munoz Marin Intl
$396
Frontier
Aug 13
SJU6:09 pmSan Juan Luis Munoz Marin Intl
6h 50m
1 stop
STL11:59 pmLambert-St Louis
Aug 16
STL3:41 pmLambert-St Louis
12h 21m
1 stop
SJU5:02 amSan Juan Luis Munoz Marin Intl
$416
Frontier
Jul 18
SJU8:37 pmSan Juan Luis Munoz Marin Intl
28h 22m
1 stop
STL11:59 pmLambert-St Louis
Jul 24
STL4:09 pmLambert-St Louis
9h 06m
1 stop
SJU2:15 amSan Juan Luis Munoz Marin Intl
$417

momondo Fare Finder

 
Customize your flight search to find flights from Puerto Rico 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 June 3, 2026.
Use the filters below to find and compare flights from Puerto Rico 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 8/13

6:00 am-10:40 pm

1 stop17h 40m

Lambert-St Louis

Mon 8/24

6:00 am-11:15 pm

1 stop16h 15m

$180

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 8/13

7:00 am-11:34 pm

1 stop17h 34m

Lambert-St Louis

Mon 8/24

6:00 am-6:34 pm

2 stops11h 34m

$252

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 8/12

7:24 pm-10:45 am

1 stop16h 21m

Lambert-St Louis

Sat 8/15

5:42 am-2:54 pm

1 stop8h 12m

$257

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 9/3

2:33 pm-11:34 pm

1 stop10h 01m

Lambert-St Louis

Mon 9/7

6:54 am-11:59 pm

1 stop16h 05m

$308

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 10/2

10:16 am-10:42 pm

2 stops13h 26m

Lambert-St Louis

Mon 10/5

8:05 pm-1:45 pm

1 stop16h 40m

$324

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 8/13

3:47 pm-12:14 am

2 stops9h 27m

Lambert-St Louis

Mon 8/24

6:00 am-6:34 pm

2 stops11h 34m

$328

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 8/12

7:00 am-11:34 pm

1 stop17h 34m

Lambert-St Louis

Sat 8/15

5:42 am-4:57 pm

2 stops10h 15m

$330
Quickest round-trip

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 9/3

6:30 am-2:55 pm

1 stop9h 25m

Lambert-St Louis

Thu 9/3

4:55 pm-11:50 pm

1 stop5h 55m

$331

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 8/13

4:53 pm-10:40 pm

1 stop6h 47m

Lambert-St Louis

Tue 8/25

10:44 am-9:55 pm

2 stops10h 11m

$336

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 8/21

7:30 am-10:40 pm

1 stop16h 10m

Lambert-St Louis

Tue 8/25

5:42 am-2:54 pm

1 stop8h 12m

$343

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 Puerto Rico 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, December is the cheapest month to fly from Puerto Rico to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $84. The month of June is another great option to travel to St. Louis, with average flight prices from Puerto Rico averaging around $133.

What is the cheapest Puerto Rico to Lambert-St Louis flight route?

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

How far in advance should I book a flight from Puerto Rico to St. Louis?

You are more likely to see cheaper flights to St. Louis from Puerto Rico when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $424 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Puerto Rico for as low as $168 on momondo.

What cabin class options are available on Puerto Rico to St. Louis flights?

There is only 1 cabin class available to choose from on Puerto Rico 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 Puerto Rico to St. Louis flights?

No. A direct flight is the cheapest option for a flight between Puerto Rico to St. Louis.

Cheap Puerto Rico to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Puerto Rico to St. Louis

Fastest flight time

7h 50m

Direct flights

Sun

Airports in St. Louis

1 airport
The fastest flight from Puerto Rico to St. Louis takes 7h 50m
Direct flights go from Puerto Rico to St. Louis on Sunday. There are no airlines offering direct flights.
There is 1 airport in St. Louis. From Puerto Rico there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Puerto Rico to St. Louis

  • When did momondo last update prices for flights from Puerto Rico to Lambert-St Louis Airport?

    Prices for flights from Puerto Rico to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from Puerto Rico to Lambert-St Louis Airport?

  • How old do you have to be to fly from Puerto Rico to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Puerto Rico to Lambert-St Louis Airport.

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

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Puerto Rico to St. Louis?

Best airlines flying from Puerto Rico to St. Louis

Compare and see reviews for airlines that fly from Puerto Rico to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $170Free CancellationRating
7.9
8,398 reviews
Search Delta flights
American AirlinesPriceFrom $225Free CancellationRating
7.1
11,642 reviews
Search American Airlines flights
FrontierPriceFrom $226Free CancellationRating
5.6
2,920 reviews
Search Frontier flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,255 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
Maryland Heights
Florissant
O'Fallon
St. Peters
Collinsville
Fenton
Alton
Wentzville
Farmington
Festus
Eureka
Clayton
Litchfield
Edwardsville
Shrewsbury
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Puerto Rico to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Puerto Rico to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to St. Louis from Puerto Rico on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Puerto Rico to St. Louis?

Once all potential Puerto Rico 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 Puerto Rico to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Puerto Rico to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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