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Cheap flights from Puerto Rico to St. Louis from $89

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 5/2. 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
0 bags

Discover deals from 900+ travel sites with momondo.

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.
Frontier Logo
3:03 am - 12:21 am
SJU
-
STL
22h 18m
1 stop
Frontier Logo
4:19 pm - 8:04 am
STL
-
SJU
14h 45m
1 stop
$176Frontier
Thu, May 7 - Sun, May 10
Frontier Logo
3:33 pm - 12:21 am
SJU
-
STL
9h 48m
1 stop
Frontier Logo
4:19 pm - 2:08 am
STL
-
SJU
8h 49m
1 stop
$186Frontier
Thu, May 7 - Sun, May 10
Frontier Logo
6:30 am - 11:19 pm
SJU
-
STL
17h 49m
1 stop
Frontier Logo
4:59 pm - 2:01 am
STL
-
SJU
8h 02m
1 stop
$226Frontier
Tue, Apr 28 - Sat, May 2
Frontier Logo
6:41 pm - 4:15 pm
SJU
-
STL
22h 34m
2 stops
Frontier Logo
5:27 pm - 11:59 pm
STL
-
SJU
29h 32m
2 stops
$259Frontier
Wed, May 20 - Mon, May 25
Frontier Logo
6:30 am - 11:19 pm
SJU
-
STL
17h 49m
1 stop
Frontier Logo
4:59 pm - 9:54 am
STL
-
SJU
15h 55m
1 stop
$260Frontier
Thu, Apr 23 - Sun, Apr 26
Frontier Logo
10:54 am - 11:19 pm
SJU
-
STL
13h 25m
1 stop
Frontier Logo
4:59 pm - 9:54 am
STL
-
SJU
15h 55m
1 stop
$267Frontier
Thu, Apr 23 - Sun, Apr 26
Frontier Logo
6:50 am - 6:24 pm
SJU
-
STL
12h 34m
1 stop
Frontier Logo
4:17 pm - 2:09 am
STL
-
SJU
8h 52m
1 stop
$270Frontier
Tue, Jun 9 - Fri, Jun 12
Multiple Airlines Logo
6:41 pm - 8:55 am
SJU
-
STL
39h 14m
2 stops
Multiple Airlines Logo
4:19 pm - 12:19 am
STL
-
SJU
7h 00m
1 stop
$273Multiple Airlines
Thu, May 7 - Sun, May 10
Frontier Logo
6:16 pm - 12:09 am
SJU
-
STL
6h 53m
1 stop
Frontier Logo
7:19 pm - 4:55 am
STL
-
SJU
8h 36m
1 stop
$276Frontier
Thu, Jun 18 - Sat, Jun 20
Frontier Logo
9:24 am - 12:09 am
SJU
-
STL
15h 45m
1 stop
Frontier Logo
4:17 pm - 2:09 am
STL
-
SJU
8h 52m
1 stop
$287Frontier
Thu, Jun 18 - Sat, Jun 20

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Frontier flights from Puerto Rico to St. Louis

Our best Frontier deals on Puerto Rico to St. Louis flight tickets
Frontier
May 7
SJU3:03 amSan Juan Luis Munoz Marin Intl
22h 18m
1 stop
STL12:21 amLambert-St Louis
May 10
STL4:19 pmLambert-St Louis
14h 45m
1 stop
SJU8:04 amSan Juan Luis Munoz Marin Intl
$176
Frontier
May 7
SJU3:33 pmSan Juan Luis Munoz Marin Intl
9h 48m
1 stop
STL12:21 amLambert-St Louis
May 10
STL4:19 pmLambert-St Louis
8h 49m
1 stop
SJU2:08 amSan Juan Luis Munoz Marin Intl
$186
Frontier
Apr 28
SJU6:30 amSan Juan Luis Munoz Marin Intl
17h 49m
1 stop
STL11:19 pmLambert-St Louis
May 2
STL4:59 pmLambert-St Louis
8h 02m
1 stop
SJU2:01 amSan Juan Luis Munoz Marin Intl
$226

Delta flights from Puerto Rico to St. Louis

Our best Delta deals on Puerto Rico to St. Louis flight tickets
Delta
May 8
SJU5:43 pmSan Juan Luis Munoz Marin Intl
7h 16m
1 stop
STL11:59 pmLambert-St Louis
May 12
STL6:00 amLambert-St Louis
6h 38m
1 stop
SJU1:38 pmSan Juan Luis Munoz Marin Intl
$336
Delta
Apr 19
SJU5:34 pmSan Juan Luis Munoz Marin Intl
7h 02m
1 stop
STL11:36 pmLambert-St Louis
Apr 25
STL6:20 amLambert-St Louis
7h 40m
1 stop
SJU3:00 pmSan Juan Luis Munoz Marin Intl
$701

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 April 17, 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 5/7

3:03 am-12:21 am

1 stop22h 18m

Lambert-St Louis

Sun 5/10

4:19 pm-8:04 am

1 stop14h 45m

$176

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 5/7

3:33 pm-12:21 am

1 stop9h 48m

Lambert-St Louis

Sun 5/10

4:19 pm-2:08 am

1 stop8h 49m

$186

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 4/28

6:30 am-11:19 pm

1 stop17h 49m

Lambert-St Louis

Sat 5/2

4:59 pm-2:01 am

1 stop8h 02m

$226

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 5/20

6:41 pm-4:15 pm

2 stops22h 34m

Lambert-St Louis

Mon 5/25

5:27 pm-11:59 pm

2 stops29h 32m

$259

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/23

6:30 am-11:19 pm

1 stop17h 49m

Lambert-St Louis

Sun 4/26

4:59 pm-9:54 am

1 stop15h 55m

$260

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/23

10:54 am-11:19 pm

1 stop13h 25m

Lambert-St Louis

Sun 4/26

4:59 pm-9:54 am

1 stop15h 55m

$267

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 6/9

6:50 am-6:24 pm

1 stop12h 34m

Lambert-St Louis

Fri 6/12

4:17 pm-2:09 am

1 stop8h 52m

$270

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 5/7

6:41 pm-8:55 am

2 stops39h 14m

Lambert-St Louis

Sun 5/10

4:19 pm-12:19 am

1 stop7h 00m

$273
Quickest round-trip

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 6/18

6:16 pm-12:09 am

1 stop6h 53m

Lambert-St Louis

Sat 6/20

7:19 pm-4:55 am

1 stop8h 36m

$276

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 6/18

9:24 am-12:09 am

1 stop15h 45m

Lambert-St Louis

Sat 6/20

4:17 pm-2:09 am

1 stop8h 52m

$287

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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, January 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 $248. The month of September is another great option to travel to St. Louis, with average flight prices from Puerto Rico averaging around $298.

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 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 $417 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 $269 on momondo.

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

There is only 1 cabin class available to choose from on Puerto Rico 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 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

6h 41m

Direct flights

Sun

Airports in St. Louis

1 airport
The fastest flight from Puerto Rico to St. Louis takes 6h 41m
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
FrontierPriceFrom $84Free CancellationRating
5.7
2,987 reviews
Search Frontier flights
DeltaPriceFrom $170Free CancellationRating
7.9
8,427 reviews
Search Delta flights
American AirlinesPriceFrom $225Free CancellationRating
7.1
11,606 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,331 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
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Clayton
Festus
Eureka
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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