$77+ Cheap flights from Puerto Rico to St. Louis (STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — STL
Oct 30 — Nov 61
Round-trip
1 adult, Economy
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Find cheap flights from Puerto Rico to St. Louis with Cheapflights
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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
Best
Last-minute
One-way
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 September 30, 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 September 30, 2026.
This Mytrip deal was found by Cheapflights users on 9/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:24 pm -
2 stops26h 16m
Mon 11/26:44 pm -
2 stops18h 35m
Deal found 9/29![Frontier logo]()
$157
This Mytrip deal was found by Cheapflights users on 9/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:24 pm -
2 stops26h 16m
Fri 10/306:44 pm -
2 stops18h 58m
Deal found 9/29![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 11/123:59 pm -
1 stop27h 41m
Mon 11/236:35 pm -
2 stops29h 36m
Deal found 9/28![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 9/25. 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 10/203:00 am -
2 stops15h 40m
Fri 10/236:35 pm -
1 stop20h 31m
Deal found 9/25![Frontier logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 10/135:11 pm -
1 stop25h 29m
Wed 10/216:35 pm -
2 stops17h 56m
Deal found 9/29![Frontier logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Mon 11/303:28 am -
2 stops33h 49m
Tue 12/86:13 pm -
1 stop14h 27m
Deal found 9/27![Frontier logo]()
$293
This Cheapflightsfares deal was found by Cheapflights users on 9/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3010:20 am -
1 stop13h 56m
Mon 11/231:20 pm -
1 stop18h 39m
Deal found 9/28![Frontier logo]()
$294
Best flights from Puerto Rico to St. LouisDiscover carefully curated flight deals from Puerto Rico to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 30, 2026.
Discover carefully curated flight deals from Puerto Rico to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 30, 2026.
This Delta deal was found by Cheapflights users on 9/30. 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.
Sat 12/127:00 am -
1 stop11h 24m
Sun 1/106:30 am -
1 stop7h 40m
Deal found 9/30![Delta logo]()
$396
This American Airlines deal was found by Cheapflights users on 9/29. 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.
Fri 10/304:17 pm -
1 stop8h 25m
Sun 11/156:00 am -
2 stops10h 05m
Deal found 9/29![American Airlines logo]()
$396
This Southwest deal was found by Cheapflights users on 9/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2510:30 pm -
1 stop12h 30m
Mon 11/3010:10 am -
1 stop12h 10m
Deal found 9/27![Southwest logo]()
$444
This Travelocity deal was found by Cheapflights users on 9/25. 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 11/1812:59 am -
2 stops19h 40m
Sat 11/281:20 pm -
1 stop7h 58m
Deal found 9/25![Frontier logo]()
$466
This United Airlines deal was found by Cheapflights users on 9/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/112:05 am -
2 stops14h 36m
Sun 1/107:30 am -
2 stops12h 52m
Deal found 9/26![United Airlines logo]()
$496
This Delta deal was found by Cheapflights users on 9/27. 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.
Mon 11/28:15 am -
1 stop10h 13m
Mon 1/259:00 am -
1 stop6h 20m
Deal found 9/27![Delta logo]()
$396
This Delta deal was found by Cheapflights users on 9/27. 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.
Fri 10/305:59 pm -
1 stop6h 55m
Mon 1/257:20 am -
1 stop8h 00m
Deal found 9/27![Delta logo]()
$396
This Delta deal was found by Cheapflights users on 9/27. 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.
Wed 10/287:15 am -
1 stop10h 13m
Wed 1/203:40 pm -
1 stop6h 10m
Deal found 9/27![Delta logo]()
$396
This United Airlines deal was found by Cheapflights users on 9/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:05 am -
2 stops10h 52m
Wed 1/206:15 am -
1 stop8h 21m
Deal found 9/27![United Airlines logo]()
$496
This Southwest deal was found by Cheapflights users on 9/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2510:30 pm -
1 stop12h 30m
Sun 11/298:50 pm -
1 stop11h 00m
Deal found 9/26![Southwest logo]()
$496
Last-minute flights from Puerto Rico to St. LouisDiscover last-minute flight deals from Puerto Rico to St. Louis. Data last updated September 30, 2026 and is based on user searches.
Discover last-minute flight deals from Puerto Rico to St. Louis. Data last updated September 30, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 10/135:11 pm -
1 stop25h 29m
Wed 10/216:35 pm -
2 stops17h 56m
Deal found 9/29![Frontier logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 10/138:45 am -
2 stops33h 55m
Sat 10/244:30 pm -
1 stop8h 23m
Deal found 9/29![Frontier logo]()
$306
This Mytrip deal was found by Cheapflights users on 9/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:24 pm -
2 stops26h 16m
Mon 11/26:44 pm -
2 stops18h 35m
Deal found 9/29![Frontier logo]()
$157
This Mytrip deal was found by Cheapflights users on 9/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:24 pm -
2 stops26h 16m
Fri 10/306:44 pm -
2 stops18h 58m
Deal found 9/29![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 9/25. 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 10/203:00 am -
2 stops15h 40m
Fri 10/236:35 pm -
1 stop20h 31m
Deal found 9/25![Frontier logo]()
$212
This CheapOair deal was found by Cheapflights users on 9/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:55 am -
1 stop21h 21m
Sun 11/154:26 pm -
1 stop15h 49m
Deal found 9/26![Frontier logo]()
$310
This Cheapflightsfares deal was found by Cheapflights users on 9/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3010:20 am -
1 stop13h 56m
Mon 11/231:20 pm -
1 stop18h 39m
Deal found 9/28![Frontier logo]()
$294
One-way flights from Puerto Rico to St. LouisSearch for one-way flight options from Puerto Rico to St. Louis. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
Search for one-way flight options from Puerto Rico to St. Louis. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 10/204:24 pm -
2 stops26h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 10/294:52 pm -
2 stops25h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 9/28. 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.
Wed 10/287:15 am -
2 stops11h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 10/2012:59 am -
2 stops17h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 9/26. 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 11/1712:59 am -
2 stops18h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 9/29. 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.
Fri 10/303:59 pm -
2 stops28h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$107
This Mytrip deal was found by Cheapflights users on 9/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:26 pm -
2 stops24h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$109
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 September 30, 2026.
Round-trip from | $157 (Mytrip) |
|---|---|
One-way from | $77 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $376 |
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 7,457,451 searches. Data last updated September 30, 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
Cheapest round-trip
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Tue 10/20
3:00 am-5:40 pm
2 stops15h 40m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$111
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Sat 10/31
7:23 am-11:16 pm
1 stop16h 53m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$151
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Sun 11/22
3:42 am-5:40 pm
2 stops15h 58m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$187
Quickest round-trip
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Sat 11/21
5:15 pm-8:15 pm
Nonstop5h 00m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$194
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Sat 12/12
2:05 am-12:22 pm
2 stops12h 17m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$198
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Wed 10/28
7:15 am-4:28 pm
1 stop10h 13m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$198
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 10/22
5:59 pm-11:54 pm
1 stop6h 55m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$198
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 12/25
7:40 am-6:18 pm
2 stops12h 38m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$198
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 12/25
6:30 am-1:15 pm
1 stop8h 45m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$198
San JuanSt. Louis
SJU San Juan Luis Munoz Marin Intl - STL Lambert-St Louis
SJUSTL
San Juan Luis Munoz Marin Intl
Wed 12/23
6:30 am-2:43 pm
1 stop10h 13m
Lambert-St Louis
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$198
Showing 1-10 of 21 resultsSorted by cheapest first
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.
SJU-STL
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
PR0-STL
SJU-STL
What is the cheapest month to book a flight from Puerto Rico to St. Louis?
Currently, January is the cheapest month in which you can book a flight from Puerto Rico to St. Louis (average of $264). Flying from Puerto Rico to St. Louis in July is currently the most expensive (average of $587). 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.
How far ahead should I book a flight from Puerto Rico to St. Louis?
The best time to book flights from Puerto Rico to St. Louis is 14 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 September 30, 2026.
See what other customers who have flown with Southwest,American Airlines, andFrontier 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.
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
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 locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Wentzville
Chesterfield
Maryland Heights
Collinsville
Edwardsville
Glencoe
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Alternative routes for Puerto Rico to St. Louis
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Complete your trip
Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Puerto Rico to St. Louis by cabin class
Find flights from Puerto Rico to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Puerto Rico and St. Louis flights
Browse other Puerto Rico and St. Louis flight options. Last updated on September 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 30, 2026.
Top 3 airlines flying from Puerto Rico to St. Louis
Discover the top 3 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 7,457,451 searches. Data last updated September 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$84 | Average$326 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$256 | Average$456 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$336 | Average$516 | FlexibilityNo cancel fee | On-time63% |