$87+ Cheap flights from Puerto Rico to St. Louis (STL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — STL
Feb 21 — Feb 281
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Puerto Rico to St. Louis
Cheapest flights from Puerto Rico to St. LouisExplore the most affordable flight options available from Puerto Rico to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 22, 2026.
Explore the most affordable flight options available from Puerto Rico to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 22, 2026.
This Priceline deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/34:36 pm
SJU
- STL
1 stop8h 57m
Frontier
Thu 2/55:42 pm
STL
- SJU
1 stop14h 42m
Frontier
Deal found 1/20![Frontier logo]()
$182
This Frontier deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/265:25 pm
SJU
- STL
1 stop8h 34m
Frontier
Mon 3/23:49 pm
STL
- SJU
1 stop9h 04m
Frontier
Deal found 1/21![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/55:50 pm
SJU
- STL
2 stops39h 01m
Multiple Airlines
Mon 2/95:42 pm
STL
- SJU
1 stop14h 05m
Multiple Airlines
Deal found 1/21![Multiple Airlines logo]()
$208
This Frontier deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/55:25 pm
SJU
- STL
1 stop8h 34m
Frontier
Mon 3/94:51 pm
STL
- SJU
1 stop8h 07m
Frontier
Deal found 1/19![Frontier logo]()
$220
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/162:34 pm
SJU
- STL
1 stop9h 59m
Delta
Sun 4/199:40 am
STL
- SJU
1 stop9h 26m
Delta
Deal found 1/20![Delta logo]()
$246
This Priceline deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/264:36 pm
SJU
- STL
1 stop8h 57m
Frontier
Sat 1/3112:12 pm
STL
- SJU
1 stop9h 47m
Frontier
Deal found 1/20![Frontier logo]()
$264
This Expedia deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/266:30 am
SJU
- STL
1 stop25h 32m
Frontier
Tue 3/314:51 pm
STL
- SJU
1 stop8h 12m
Frontier
Deal found 1/20![Frontier logo]()
$271
This Travelocity deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/253:08 am
SJU
- STL
1 stop28h 54m
Frontier
Mon 3/307:47 am
STL
- SJU
1 stop25h 10m
Frontier
Deal found 1/20![Frontier logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/34:40 pm
SJU
- STL
2 stops16h 11m
Multiple Airlines
Thu 2/55:42 pm
STL
- SJU
1 stop14h 05m
Multiple Airlines
Deal found 1/20![Multiple Airlines logo]()
$280
This American Airlines deal was found by Cheapflights users on 1/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/143:07 pm
SJU
- STL
1 stop9h 41m
American Airlines
Tue 5/196:27 am
STL
- SJU
1 stop14h 38m
American Airlines
Deal found 1/22![American Airlines logo]()
$286
This Frontier deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/1312:27 pm
SJU
- STL
1 stop14h 00m
Frontier
Fri 2/203:49 pm
STL
- SJU
1 stop6h 54m
Frontier
Deal found 1/20![Frontier logo]()
$316
Find flight deals from Puerto Rico to St. Louis
Keep the following information in mind while searching for Puerto Rico to St. Louis flight deals. Data was last updated January 22, 2026.
Round-trip from | $182 (Priceline) |
|---|---|
One-way from | $87 (Priceline) |
Popular in | June |
Cheapest in | January |
Average price | $248 |
Good one-way deal | $483 or less |
Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated January 22, 2026.
Use the filters below to find and compare flights from Puerto Rico to St. Louis that are best for you.
Fly from
Puerto Rico
Fly to
St. Louis
Route
Depart
Return
Price
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 2/26
5:25 pm-11:59 pm
1 stop8h 34m
Lambert-St Louis
Mon 3/2
3:49 pm-2:53 am
1 stop9h 04m
$203
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
Wed 5/20
12:39 am-8:50 am
1 stop9h 11m
Lambert-St Louis
Tue 5/26
6:20 am-11:41 pm
1 stop16h 21m
$246
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 4/23
3:56 pm-10:56 pm
1 stop8h 00m
Lambert-St Louis
Tue 4/28
10:10 am-8:38 pm
1 stop9h 28m
$246
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 4/16
2:34 pm-11:33 pm
1 stop9h 59m
Lambert-St Louis
Sun 4/19
9:40 am-8:06 pm
1 stop9h 26m
$246
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 5/14
3:07 pm-11:48 pm
1 stop9h 41m
Lambert-St Louis
Tue 5/19
6:27 am-10:05 pm
1 stop14h 38m
$286
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Mon 3/2
6:00 am-6:51 am
2 stops50h 51m
Lambert-St Louis
Sun 3/8
4:51 pm-9:17 am
1 stop15h 26m
$316
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 2/13
12:27 pm-12:27 am
1 stop14h 00m
Lambert-St Louis
Fri 2/20
3:49 pm-12:43 am
1 stop6h 54m
$316
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Tue 2/10
2:05 am-12:29 pm
2 stops12h 24m
$123
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Tue 5/12
5:35 am-1:25 pm
2 stops8h 50m
$123
Showing 1-10 of 18 results
Best time to book a flight from Puerto Rico to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Puerto Rico with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Puerto Rico to St. Louis
What is the cheapest month to book a flight from Puerto Rico to St. Louis?
Currently, June is the cheapest month in which you can book a flight from Puerto Rico to St. Louis (average of $112). Flying from Puerto Rico to St. Louis in August is currently the most expensive (average of $264). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from PR to STL?
Find hourly flight availability from Puerto Rico to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 22, 2026.
When flying from Puerto Rico to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated January 22, 2026.
See what other customers who have flown with Southwest, Delta, and American Airlines from Puerto Rico to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Puerto Rico to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus
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Alternative routes for Puerto Rico to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.
Top 4 airlines flying from Puerto Rico to St. Louis
Discover the top 4 airlines that operate flights from Puerto Rico to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$84 | Average$267 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$375 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$225 | Average$424 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$610 | FlexibilityNo cancel fee | On-time63% |