$160+ Cheap flights from San Juan 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — STL
Jul 12 — Jul 191
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Juan 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 San Juan to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Juan to St. LouisExplore the most affordable flight options available from San Juan to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2026.
Explore the most affordable flight options available from San Juan to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2026.
This Delta deal was found by Cheapflights users on 6/7. 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 8/135:49 pm
SJU
- STL
1 stop7h 09m
Delta
Tue 8/2511:00 am
STL
- SJU
1 stop10h 29m
Delta
Deal found 6/7![Delta logo]()
$336
This American Airlines deal was found by Cheapflights users on 6/11. 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 9/244:19 pm
SJU
- STL
1 stop8h 24m
American Airlines
Wed 9/305:13 pm
STL
- SJU
2 stops15h 11m
American Airlines
Deal found 6/11![American Airlines logo]()
$347
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Mon 9/71:00 am
SJU
- STL
2 stops11h 57m
United Airlines
Tue 9/228:00 am
STL
- SJU
2 stops11h 38m
United Airlines
Deal found 6/12![United Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 6/11. 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.
Tue 8/46:00 am
SJU
- STL
1 stop9h 50m
Southwest
Sat 8/86:45 am
STL
- SJU
1 stop14h 10m
Southwest
Deal found 6/11![Southwest logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 8/46:45 am
SJU
- STL
2 stops27h 12m
Frontier
Sat 8/84:57 pm
STL
- SJU
1 stop20h 19m
Frontier
Deal found 6/11![Frontier logo]()
$378
This Southwest deal was found by Cheapflights users on 6/8. 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 10/146:10 am
SJU
- STL
2 stops14h 25m
Southwest
Sun 10/1810:15 am
STL
- SJU
2 stops9h 20m
Southwest
Deal found 6/8![Southwest logo]()
$381
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 7/95:15 pm
SJU
- STL
1 stop16h 42m
Frontier
Sun 7/126:34 pm
STL
- SJU
2 stops42h 21m
Frontier
Deal found 6/12![Frontier logo]()
$396
This American Airlines deal was found by Cheapflights users on 6/8. 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 9/252:58 pm
SJU
- STL
1 stop9h 48m
American Airlines
Thu 10/12:13 pm
STL
- SJU
1 stop18h 11m
American Airlines
Deal found 6/8![American Airlines logo]()
$399
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/165:15 pm
SJU
- STL
1 stop16h 42m
Frontier
Mon 7/274:57 pm
STL
- SJU
2 stops44h 03m
Frontier
Deal found 6/10![Frontier logo]()
$400
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 7/176:30 am
SJU
- STL
2 stops27h 27m
Frontier
Sat 8/14:57 pm
STL
- SJU
1 stop20h 19m
Frontier
Deal found 6/7![Frontier logo]()
$404
Best flights from San Juan to St. LouisDiscover carefully curated flight deals from San Juan to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2026.
Discover carefully curated flight deals from San Juan to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2026.
This Delta deal was found by Cheapflights users on 6/7. 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 8/135:49 pm
SJU
- STL
1 stop7h 09m
Delta
Tue 8/2511:00 am
STL
- SJU
1 stop10h 29m
Delta
Deal found 6/7![Delta logo]()
$336
This Southwest deal was found by Cheapflights users on 6/10. 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.
Sun 8/169:25 pm
SJU
- STL
1 stop11h 20m
Southwest
Sat 8/228:00 am
STL
- SJU
1 stop7h 40m
Southwest
Deal found 6/10![Southwest logo]()
$336
This American Airlines deal was found by Cheapflights users on 6/9. 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 7/247:00 am
SJU
- STL
1 stop17h 32m
American Airlines
Tue 7/286:14 am
STL
- SJU
1 stop15h 43m
American Airlines
Deal found 6/9![American Airlines logo]()
$466
This Southwest deal was found by Cheapflights users on 6/12. 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.
Thu 7/1610:20 pm
SJU
- STL
1 stop13h 00m
Southwest
Mon 7/2711:00 am
STL
- SJU
1 stop12h 20m
Southwest
Deal found 6/12![Southwest logo]()
$413
This Southwest deal was found by Cheapflights users on 6/12. 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.
Tue 8/188:20 am
SJU
- STL
2 stops9h 25m
Southwest
Tue 9/110:15 am
STL
- SJU
2 stops7h 45m
Southwest
Deal found 6/12![Southwest logo]()
$416
This Delta deal was found by Cheapflights users on 6/11. 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.
Tue 7/285:50 pm
SJU
- STL
1 stop7h 03m
Delta
Fri 7/319:24 am
STL
- SJU
1 stop10h 21m
Delta
Deal found 6/11![Delta logo]()
$537
This Southwest deal was found by Cheapflights users on 6/10. 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.
Fri 6/265:30 am
SJU
- STL
2 stops14h 00m
Southwest
Sat 7/41:25 pm
STL
- SJU
1 stop6h 35m
Southwest
Deal found 6/10![Southwest logo]()
$451
This Southwest deal was found by Cheapflights users on 6/7. 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 7/85:00 am
SJU
- STL
2 stops14h 25m
Southwest
Fri 7/102:50 pm
STL
- SJU
1 stop8h 20m
Southwest
Deal found 6/7![Southwest logo]()
$528
This Southwest deal was found by Cheapflights users on 6/8. 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.
Sat 6/2711:20 am
SJU
- STL
1 stop11h 40m
Southwest
Sat 7/410:30 am
STL
- SJU
Nonstop4h 30m
Southwest
Deal found 6/8![Southwest logo]()
$543
This Southwest deal was found by Cheapflights users on 6/12. 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.
Fri 7/106:30 am
SJU
- STL
2 stops9h 45m
Southwest
Sun 7/1210:15 am
STL
- SJU
2 stops13h 30m
Southwest
Deal found 6/12![Southwest logo]()
$547
Last-minute flights from San Juan to St. LouisDiscover last-minute flight deals from San Juan to St. Louis. Data last updated June 12, 2026 and is based on user searches.
Discover last-minute flight deals from San Juan to St. Louis. Data last updated June 12, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 6/10. 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.
Fri 6/265:30 am
SJU
- STL
2 stops14h 00m
Southwest
Sat 7/41:25 pm
STL
- SJU
1 stop6h 35m
Southwest
Deal found 6/10![Southwest logo]()
$451
This Priceline deal was found by Cheapflights users on 6/11. 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.
Sat 7/46:25 am
SJU
- STL
1 stop13h 09m
Frontier
Sat 7/113:41 pm
STL
- SJU
1 stop12h 21m
Frontier
Deal found 6/11![Frontier logo]()
$416
This CheapOair deal was found by Cheapflights users on 6/11. 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.
Tue 7/78:37 pm
SJU
- STL
1 stop28h 22m
Frontier
Mon 7/134:09 pm
STL
- SJU
1 stop18h 07m
Frontier
Deal found 6/11![Frontier logo]()
$428
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 7/95:15 pm
SJU
- STL
1 stop16h 42m
Frontier
Sun 7/126:34 pm
STL
- SJU
2 stops42h 21m
Frontier
Deal found 6/12![Frontier logo]()
$396
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/97:25 am
SJU
- STL
1 stop13h 38m
American Airlines
Sun 7/125:10 am
STL
- SJU
1 stop16h 49m
American Airlines
Deal found 6/12![American Airlines logo]()
$422
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 7/96:30 am
SJU
- STL
2 stops27h 27m
Frontier
Tue 7/143:41 pm
STL
- SJU
1 stop12h 21m
Frontier
Deal found 6/11![Frontier logo]()
$426
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 7/105:15 pm
SJU
- STL
1 stop16h 42m
Frontier
Fri 7/174:57 pm
STL
- SJU
2 stops43h 58m
Frontier
Deal found 6/12![Frontier logo]()
$430
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/165:15 pm
SJU
- STL
1 stop16h 42m
Frontier
Mon 7/274:57 pm
STL
- SJU
2 stops44h 03m
Frontier
Deal found 6/10![Frontier logo]()
$400
This Southwest deal was found by Cheapflights users on 6/12. 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.
Thu 7/1610:20 pm
SJU
- STL
1 stop13h 00m
Southwest
Mon 7/2711:00 am
STL
- SJU
1 stop12h 20m
Southwest
Deal found 6/12![Southwest logo]()
$413
This CheapOair deal was found by Cheapflights users on 6/10. 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.
Fri 7/2410:48 pm
SJU
- STL
1 stop26h 11m
Frontier
Tue 7/283:41 pm
STL
- SJU
1 stop12h 21m
Frontier
Deal found 6/10![Frontier logo]()
$445
One-way flights from San Juan to St. LouisSearch for one-way flight options from San Juan to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
Search for one-way flight options from San Juan to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 8/106:26 am
SJU
- STL
2 stops36h 11m
Frontier
Deal found 6/10![Frontier logo]()
$160
This Southwest deal was found by Cheapflights users on 6/12. 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 9/91:20 pm
SJU
- STL
1 stop7h 35m
Southwest
Deal found 6/12![Southwest logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 8/56:26 am
SJU
- STL
2 stops36h 11m
Frontier
Deal found 6/10![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 8/46:45 am
SJU
- STL
2 stops27h 12m
Frontier
Deal found 6/10![Frontier logo]()
$166
This Southwest deal was found by Cheapflights users on 6/9. 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.
Thu 8/135:30 am
SJU
- STL
1 stop7h 05m
Southwest
Deal found 6/9![Southwest logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/86:30 am
SJU
- STL
2 stops36h 07m
Frontier
Deal found 6/10![Frontier logo]()
$170
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Wed 7/297:00 am
SJU
- STL
1 stop17h 32m
American Airlines
Deal found 6/11![American Airlines logo]()
$171
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 6/302:05 am
SJU
- STL
1 stop9h 02m
United Airlines
Deal found 6/10![United Airlines logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 7/176:30 am
SJU
- STL
2 stops27h 27m
Frontier
Deal found 6/7![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 8/136:00 am
SJU
- STL
2 stops12h 37m
Frontier
Deal found 6/9![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 8/118:37 pm
SJU
- STL
1 stop28h 22m
Frontier
Deal found 6/11![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Sat 9/56:00 am
SJU
- STL
2 stops36h 30m
Frontier
Deal found 6/10![Frontier logo]()
$182
Find flight deals from San Juan to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2026.
Round-trip from | $336 (Delta) |
|---|---|
One-way from | $160 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $486 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Juan 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 June 12, 2026.
Use the filters below to find and compare flights from San Juan to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 8/13
5:49 pm-11:58 pm
1 stop7h 09m
Lambert-St Louis
Tue 8/25
11:00 am-10:29 pm
1 stop10h 29m
$336
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Sun 8/16
9:25 pm-7:45 am
1 stop11h 20m
Lambert-St Louis
Sat 8/22
8:00 am-4:40 pm
1 stop7h 40m
$336
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 7/16
10:20 pm-10:20 am
1 stop13h 00m
Lambert-St Louis
Mon 7/27
11:00 am-12:20 am
1 stop12h 20m
$413
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Tue 8/18
8:20 am-4:45 pm
2 stops9h 25m
Lambert-St Louis
Tue 9/1
10:15 am-7:00 pm
2 stops7h 45m
$416
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 6/26
5:30 am-6:30 pm
2 stops14h 00m
Lambert-St Louis
Sat 7/4
1:25 pm-9:00 pm
1 stop6h 35m
$451
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 7/24
7:00 am-11:32 pm
1 stop17h 32m
Lambert-St Louis
Tue 7/28
6:14 am-10:57 pm
1 stop15h 43m
$466
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Wed 7/8
5:00 am-6:25 pm
2 stops14h 25m
Lambert-St Louis
Fri 7/10
2:50 pm-12:10 am
1 stop8h 20m
$528
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Tue 7/28
5:50 pm-11:53 pm
1 stop7h 03m
Lambert-St Louis
Fri 7/31
9:24 am-8:45 pm
1 stop10h 21m
$537
Quickest round-trip
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Sat 6/27
11:20 am-10:00 pm
1 stop11h 40m
Lambert-St Louis
Sat 7/4
10:30 am-4:00 pm
Nonstop4h 30m
$543
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 7/10
6:30 am-3:15 pm
2 stops9h 45m
Lambert-St Louis
Sun 7/12
10:15 am-12:45 am
2 stops13h 30m
$547
Showing 1-10 of 20 resultsSorted by cheapest first
Best time to book a flight from San Juan to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from San Juan with our price prediction graph.
PR1-STL
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 San Juan to St. Louis
PR1-STL
SJU-STL
What is the cheapest month to book a flight from San Juan to St. Louis?
Currently, December is the cheapest month in which you can book a flight from San Juan to St. Louis (average of $84). Flying from San Juan to St. Louis in July is currently the most expensive (average of $238). 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 SJU to STL?
Find hourly flight availability from San Juan 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 June 12, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Juan to St. Louis as you normally would.
How much does it cost to fly round-trip from San Juan to St. Louis?
How far ahead should I book a flight from San Juan to St. Louis?
Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Juan to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 June 12, 2026.
See what other customers who have flown with Southwest,Delta, andAmerican Airlines from San Juan 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.
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from San Juan 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
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Complete your trip
Flights by cabin class
Other flight options
Popular flights
St. Louis flight routes
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 San Juan to St. Louis by cabin class
Find flights from San Juan to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Juan and St. Louis flights
Browse other San Juan and St. Louis flight options. Last updated on June 12, 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 June 12, 2026.
Top 4 airlines flying from San Juan to St. Louis
Discover the top 4 airlines that operate flights from San Juan 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 June 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$84 | Average$318 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$554 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$225 | Average$409 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$583 | FlexibilityNo cancel fee | On-time63% |