$117+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — STL
Aug 22 — Aug 291
Round-trip
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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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 July 23, 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 July 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/128:37 pm
SJU
- STL
1 stop28h 22m
Frontier
Mon 8/316:17 pm
STL
- SJU
2 stops29h 39m
Frontier
Deal found 7/23![Frontier logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:03 am
SJU
- STL
1 stop11h 36m
Frontier
Mon 9/2110:35 am
STL
- SJU
2 stops36h 22m
Frontier
Deal found 7/22![Frontier logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Thu 10/14:30 pm
SJU
- STL
1 stop18h 10m
Frontier
Mon 10/510:35 am
STL
- SJU
2 stops12h 22m
Frontier
Deal found 7/20![Frontier logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 10/65:12 pm
SJU
- STL
2 stops17h 28m
Frontier
Mon 10/1210:35 am
STL
- SJU
1 stop27h 11m
Frontier
Deal found 7/23![Frontier logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Fri 8/146:26 am
SJU
- STL
2 stops27h 31m
Frontier
Thu 8/276:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/21![Frontier logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 7/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:26 am
SJU
- STL
2 stops27h 31m
Frontier
Sun 8/236:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/19![Frontier logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/136:00 am
SJU
- STL
2 stops12h 37m
Frontier
Thu 8/276:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/21![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/136:00 am
SJU
- STL
2 stops12h 37m
Frontier
Sun 8/306:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/21![Frontier logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:25 pm
SJU
- STL
1 stop17h 15m
Frontier
Sat 9/1210:35 am
STL
- SJU
2 stops12h 22m
Frontier
Deal found 7/22![Frontier logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/1311:50 am
SJU
- STL
1 stop13h 09m
Frontier
Mon 8/174:57 pm
STL
- SJU
2 stops30h 59m
Frontier
Deal found 7/23![Frontier logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/146:26 am
SJU
- STL
2 stops27h 31m
Frontier
Sun 8/306:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/23![Frontier logo]()
$335
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 July 23, 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 July 23, 2026.
This Delta deal was found by Cheapflights users on 7/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:00 am
SJU
- STL
1 stop7h 23m
Delta
Wed 9/302:30 pm
STL
- SJU
1 stop6h 49m
Delta
Deal found 7/19![Delta logo]()
$356
This American Airlines deal was found by Cheapflights users on 7/23. 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.
Tue 10/66:20 am
SJU
- STL
2 stops9h 26m
American Airlines
Mon 10/128:48 am
STL
- SJU
1 stop13h 32m
American Airlines
Deal found 7/23![American Airlines logo]()
$356
This Southwest deal was found by Cheapflights users on 7/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:55 pm
SJU
- STL
1 stop11h 45m
Southwest
Wed 8/196:25 am
STL
- SJU
1 stop9h 00m
Southwest
Deal found 7/21![Southwest logo]()
$366
This United Airlines deal was found by Cheapflights users on 7/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:00 am
SJU
- STL
2 stops14h 17m
United Airlines
Sun 10/46:15 am
STL
- SJU
1 stop8h 27m
United Airlines
Deal found 7/21![United Airlines logo]()
$446
This Delta deal was found by Cheapflights users on 7/23. 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 10/62:31 pm
SJU
- STL
1 stop10h 17m
Delta
Mon 10/1212:00 pm
STL
- SJU
1 stop8h 59m
Delta
Deal found 7/23![Delta logo]()
$356
This Southwest deal was found by Cheapflights users on 7/23. 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 8/136:30 am
SJU
- STL
1 stop9h 25m
Southwest
Sun 8/169:00 pm
STL
- SJU
1 stop12h 55m
Southwest
Deal found 7/23![Southwest logo]()
$378
This Delta deal was found by Cheapflights users on 7/20. 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 9/175:59 pm
SJU
- STL
1 stop6h 43m
Delta
Mon 9/217:05 am
STL
- SJU
1 stop8h 44m
Delta
Deal found 7/20![Delta logo]()
$356
Last-minute flights from San Juan to St. LouisDiscover last-minute flight deals from San Juan to St. Louis. Data last updated July 23, 2026 and is based on user searches.
Discover last-minute flight deals from San Juan to St. Louis. Data last updated July 23, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Tue 8/116:26 am
SJU
- STL
2 stops27h 31m
Frontier
Sun 8/166:34 pm
STL
- SJU
1 stop18h 42m
Frontier
Deal found 7/21![Frontier logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/128:37 pm
SJU
- STL
1 stop28h 22m
Frontier
Mon 8/316:17 pm
STL
- SJU
2 stops29h 39m
Frontier
Deal found 7/23![Frontier logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/136:00 am
SJU
- STL
2 stops12h 37m
Frontier
Thu 8/276:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/21![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/136:00 am
SJU
- STL
2 stops12h 37m
Frontier
Sun 8/306:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/21![Frontier logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/1311:50 am
SJU
- STL
1 stop13h 09m
Frontier
Mon 8/174:57 pm
STL
- SJU
2 stops30h 59m
Frontier
Deal found 7/23![Frontier logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/1311:50 am
SJU
- STL
1 stop13h 09m
Frontier
Sun 8/166:34 pm
STL
- SJU
2 stops29h 07m
Frontier
Deal found 7/23![Frontier logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Fri 8/146:26 am
SJU
- STL
2 stops27h 31m
Frontier
Thu 8/276:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/21![Frontier logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/146:26 am
SJU
- STL
2 stops27h 31m
Frontier
Sun 8/306:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/23![Frontier logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 7/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:26 am
SJU
- STL
2 stops27h 31m
Frontier
Sun 8/236:17 pm
STL
- SJU
1 stop18h 59m
Frontier
Deal found 7/19![Frontier logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Wed 8/265:37 pm
SJU
- STL
2 stops24h 45m
Frontier
Sat 8/295:02 pm
STL
- SJU
1 stop8h 13m
Frontier
Deal found 7/21![Frontier logo]()
$339
This Southwest deal was found by Cheapflights users on 7/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/261:20 pm
SJU
- STL
1 stop7h 35m
Southwest
Sat 8/2910:15 am
STL
- SJU
1 stop8h 05m
Southwest
Deal found 7/21![Southwest logo]()
$356
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 July 23, 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 July 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/204:39 pm
SJU
- STL
2 stops42h 01m
Frontier
Deal found 7/22![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 7/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:00 am
SJU
- STL
2 stops28h 40m
Frontier
Deal found 7/19![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/224:39 pm
SJU
- STL
2 stops42h 01m
Frontier
Deal found 7/22![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:39 pm
SJU
- STL
2 stops42h 01m
Frontier
Deal found 7/22![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 7/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am
SJU
- STL
2 stops28h 40m
Frontier
Deal found 7/19![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Sat 8/155:22 pm
SJU
- STL
2 stops40h 35m
Frontier
Deal found 7/20![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:15 pm
SJU
- STL
2 stops25h 07m
Frontier
Deal found 7/22![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/224:39 pm
SJU
- STL
2 stops42h 01m
Frontier
Deal found 7/22![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/182:36 pm
SJU
- STL
2 stops44h 04m
Frontier
Deal found 7/22![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/242:36 pm
SJU
- STL
2 stops44h 04m
Frontier
Deal found 7/22![Frontier logo]()
$139
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 July 23, 2026.
Round-trip from | $296 (Kiwi.com) |
|---|---|
One-way from | $117 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $543 |
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 July 23, 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
Quickest round-trip
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 9/24
7:00 am-1:23 pm
1 stop7h 23m
Lambert-St Louis
Wed 9/30
2:30 pm-10:19 pm
1 stop6h 49m
$356
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Tue 10/6
6:20 am-2:46 pm
2 stops9h 26m
Lambert-St Louis
Mon 10/12
8:48 am-11:20 pm
1 stop13h 32m
$356
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Tue 10/6
2:31 pm-11:48 pm
1 stop10h 17m
Lambert-St Louis
Mon 10/12
12:00 pm-9:59 pm
1 stop8h 59m
$356
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 9/17
5:59 pm-11:42 pm
1 stop6h 43m
Lambert-St Louis
Mon 9/21
7:05 am-4:49 pm
1 stop8h 44m
$356
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 8/14
8:55 pm-7:40 am
1 stop11h 45m
Lambert-St Louis
Wed 8/19
6:25 am-4:25 pm
1 stop9h 00m
$366
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 8/13
6:30 am-2:55 pm
1 stop9h 25m
Lambert-St Louis
Sun 8/16
9:00 pm-10:55 am
1 stop12h 55m
$378
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Tue 9/29
1:00 am-2:17 pm
2 stops14h 17m
Lambert-St Louis
Sun 10/4
6:15 am-3:42 pm
1 stop8h 27m
$446
Cheapest one-way
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Sat 9/19
2:30 pm-8:35 pm
1 stop7h 05m
$178
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 11/20
8:25 am-3:41 pm
1 stop9h 16m
$178
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Sat 8/22
2:31 pm-8:42 pm
1 stop7h 11m
$178
Showing 1-10 of 19 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, January is the cheapest month in which you can book a flight from San Juan to St. Louis (average of $248). Flying from San Juan to St. Louis in July is currently the most expensive (average of $543). 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 July 23, 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?
Airfare is below average for this route at the moment.
San Juan to St. Louis flights typically cost between $411 and $593 in August.The cheapest round-trip price found within the last 5 days was $314 on Frontier (Aug 12-Aug 31).
How far ahead should I book a flight from San Juan to St. Louis?
Booking 7 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 July 23, 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.
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
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
Farmington
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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 July 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$84 | Average$304 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$205 | Average$596 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$225 | Average$411 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$336 | Average$566 | FlexibilityNo cancel fee | On-time63% |