$80+ Cheap flights to St. Charles
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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
Apr 15 — Apr 221
Round-trip
1 adult, Economy
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Cheapest flights to St. CharlesExplore the most affordable flight options available to St. Charles. Find the lowest fares based on data from user searches, with prices last updated on March 16, 2026.
Explore the most affordable flight options available to St. Charles. Find the lowest fares based on data from user searches, with prices last updated on March 16, 2026.
This Southwest deal was found by Cheapflights users on 3/12. 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 4/812:00 pm
LGA
- STL
Nonstop2h 50m
Southwest
Sat 4/116:00 am
STL
- LGA
Nonstop2h 20m
Southwest
Deal found 3/12![Southwest logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/109:59 am
LGA
- STL
2 stops14h 59m
Multiple Airlines
Wed 4/158:23 pm
STL
- LGA
1 stop20h 22m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/131:14 pm
JFK
- STL
1 stop11h 11m
Frontier
Mon 4/208:23 pm
STL
- JFK
1 stop14h 27m
Frontier
Deal found 3/14![Frontier logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 5/143:29 pm
LGA
- STL
1 stop9h 52m
Multiple Airlines
Mon 5/185:27 pm
STL
- LGA
2 stops25h 17m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$286
This Gotogate deal was found by Cheapflights users on 3/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:25 pm
LGA
- STL
1 stop27h 54m
Frontier
Mon 4/204:59 pm
STL
- LGA
1 stop22h 05m
Frontier
Deal found 3/15![Frontier logo]()
$288
This Frontier deal was found by Cheapflights users on 3/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:28 pm
LGA
- STL
1 stop12h 23m
Frontier
Fri 4/178:39 am
STL
- LGA
1 stop12h 25m
Frontier
Deal found 3/12![Frontier logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/711:30 am
JFK
- STL
2 stops12h 55m
Frontier
Thu 4/96:29 pm
STL
- JFK
1 stop5h 51m
Frontier
Deal found 3/13![Frontier logo]()
$290
This CheapOair deal was found by Cheapflights users on 3/16. 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 4/228:25 pm
LGA
- STL
1 stop27h 54m
Frontier
Fri 4/244:59 pm
STL
- LGA
1 stop22h 05m
Frontier
Deal found 3/16![Frontier logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 5/11:00 pm
JFK
- STL
2 stops11h 19m
Frontier
Mon 5/48:23 pm
STL
- JFK
1 stop14h 16m
Frontier
Deal found 3/12![Frontier logo]()
$291
This Southwest deal was found by Cheapflights users on 3/16. 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 4/86:00 am
LGA
- STL
1 stop6h 30m
Southwest
Wed 4/81:25 pm
STL
- LGA
1 stop7h 00m
Southwest
Deal found 3/16![Southwest logo]()
$293
This American Airlines deal was found by Cheapflights users on 3/12. 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.
Tue 5/55:10 pm
JFK
- STL
1 stop5h 57m
American Airlines
Wed 5/65:51 am
STL
- JFK
1 stop4h 39m
American Airlines
Deal found 3/12![American Airlines logo]()
$293
This Southwest deal was found by Cheapflights users on 3/12. 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 4/712:00 pm
LGA
- STL
Nonstop2h 50m
Southwest
Thu 4/95:40 am
STL
- LGA
1 stop4h 35m
Southwest
Deal found 3/12![Southwest logo]()
$294
Best flights to St. CharlesDiscover carefully curated flight deals to St. Charles that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 16, 2026.
Discover carefully curated flight deals to St. Charles that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 16, 2026.
This Southwest deal was found by Cheapflights users on 3/12. 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 4/225:30 pm
LGA
- STL
Nonstop2h 55m
Southwest
Fri 4/248:00 pm
STL
- LGA
Nonstop2h 25m
Southwest
Deal found 3/12![Southwest logo]()
$295
This Delta deal was found by Cheapflights users on 3/16. 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 7/176:59 am
LGA
- STL
Nonstop2h 45m
Delta
Mon 7/206:00 am
STL
- LGA
Nonstop2h 27m
Delta
Deal found 3/16![Delta logo]()
$317
This United Airlines deal was found by Cheapflights users on 3/16. 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 7/1910:17 pm
EWR
- STL
Nonstop2h 28m
United Airlines
Wed 7/226:00 am
STL
- EWR
1 stop5h 06m
United Airlines
Deal found 3/16![United Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 4/66:00 am
JFK
- STL
1 stop29h 30m
Frontier
Sun 4/2611:44 am
STL
- JFK
1 stop23h 06m
Frontier
Deal found 3/16![Frontier logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 5/299:41 am
SWF
- STL
1 stop15h 40m
Multiple Airlines
Sun 5/314:19 pm
STL
- SWF
1 stop15h 32m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$363
This Alaska Airlines deal was found by Cheapflights users on 3/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:00 am
JFK
- STL
1 stop17h 59m
Alaska Airlines
Wed 4/157:00 am
STL
- JFK
1 stop14h 59m
Alaska Airlines
Deal found 3/14![Alaska Airlines logo]()
$623
This Southwest deal was found by Cheapflights users on 3/16. 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 4/295:30 pm
LGA
- STL
Nonstop2h 55m
Southwest
Mon 5/48:00 pm
STL
- LGA
Nonstop2h 25m
Southwest
Deal found 3/16![Southwest logo]()
$315
This Delta deal was found by Cheapflights users on 3/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/55:00 pm
LGA
- STL
1 stop5h 19m
Delta
Fri 5/85:15 pm
STL
- LGA
1 stop5h 03m
Delta
Deal found 3/12![Delta logo]()
$325
This Southwest deal was found by Cheapflights users on 3/12. 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.
Mon 4/276:30 am
LGA
- STL
1 stop7h 40m
Southwest
Fri 5/15:50 am
STL
- LGA
Nonstop2h 20m
Southwest
Deal found 3/12![Southwest logo]()
$316
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Tue 4/144:50 pm
EWR
- STL
1 stop5h 23m
United Airlines
Wed 4/157:45 am
STL
- EWR
1 stop6h 15m
United Airlines
Deal found 3/12![United Airlines logo]()
$363
This Delta deal was found by Cheapflights users on 3/16. 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 7/166:59 am
LGA
- STL
Nonstop2h 45m
Delta
Sun 7/199:00 am
STL
- LGA
Nonstop2h 28m
Delta
Deal found 3/16![Delta logo]()
$337
This Southwest deal was found by Cheapflights users on 3/14. 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 5/86:35 pm
LGA
- STL
Nonstop2h 55m
Southwest
Sun 5/107:55 pm
STL
- LGA
Nonstop2h 25m
Southwest
Deal found 3/14![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/73:15 pm
EWR
- STL
1 stop6h 58m
United Airlines
Sat 4/116:30 am
STL
- EWR
1 stop4h 50m
United Airlines
Deal found 3/15![United Airlines logo]()
$367
This Delta deal was found by Cheapflights users on 3/11. 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.
Mon 5/46:35 pm
JFK
- STL
1 stop6h 01m
Delta
Thu 5/77:01 pm
STL
- JFK
1 stop5h 05m
Delta
Deal found 3/11![Delta logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Fri 3/279:47 am
SWF
- STL
1 stop22h 20m
Multiple Airlines
Sun 3/294:51 pm
STL
- SWF
1 stop15h 06m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$447
This Southwest deal was found by Cheapflights users on 3/16. 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 6/246:30 am
LGA
- STL
Nonstop2h 35m
Southwest
Thu 6/257:55 pm
STL
- LGA
Nonstop2h 25m
Southwest
Deal found 3/16![Southwest logo]()
$337
This Delta deal was found by Cheapflights users on 3/14. 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 7/107:00 pm
LGA
- STL
1 stop5h 38m
Delta
Mon 7/135:00 pm
STL
- LGA
Nonstop2h 33m
Delta
Deal found 3/14![Delta logo]()
$347
This United Airlines deal was found by Cheapflights users on 3/16. 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 5/54:45 pm
EWR
- STL
1 stop5h 28m
United Airlines
Sun 5/106:15 am
STL
- EWR
Nonstop2h 34m
United Airlines
Deal found 3/16![United Airlines logo]()
$383
This Southwest deal was found by Cheapflights users on 3/13. 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.
Mon 6/88:55 am
LGA
- STL
Nonstop2h 50m
Southwest
Sat 6/1312:50 pm
STL
- LGA
1 stop5h 45m
Southwest
Deal found 3/13![Southwest logo]()
$338
This Delta deal was found by Cheapflights users on 3/14. 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 6/256:59 am
LGA
- STL
Nonstop2h 45m
Delta
Mon 6/293:42 pm
STL
- LGA
1 stop7h 08m
Delta
Deal found 3/14![Delta logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/1211:48 am
SWF
- STL
1 stop21h 03m
Multiple Airlines
Sun 4/194:59 pm
STL
- SWF
2 stops17h 32m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$468
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Wed 6/2410:07 pm
EWR
- STL
Nonstop2h 28m
United Airlines
Sat 6/276:01 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 3/14![United Airlines logo]()
$391
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Thu 4/309:59 pm
EWR
- STL
Nonstop2h 58m
United Airlines
Mon 5/45:28 pm
STL
- EWR
1 stop4h 36m
United Airlines
Deal found 3/12![United Airlines logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Sun 6/79:38 am
SWF
- STL
1 stop15h 43m
Multiple Airlines
Sun 6/144:44 pm
STL
- SWF
2 stops17h 51m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 3/13. 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 5/203:10 pm
JFK
- STL
Nonstop2h 55m
Delta
Sat 5/234:15 pm
STL
- JFK
Nonstop2h 40m
Delta
Deal found 3/13![Delta logo]()
$386
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Fri 4/179:59 pm
EWR
- STL
Nonstop2h 58m
United Airlines
Sun 4/196:15 am
STL
- EWR
Nonstop2h 36m
United Airlines
Deal found 3/12![United Airlines logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 6/59:39 am
SWF
- STL
1 stop15h 42m
Multiple Airlines
Sat 6/134:44 pm
STL
- SWF
1 stop15h 14m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$486
This Delta deal was found by Cheapflights users on 3/14. 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 5/143:10 pm
JFK
- STL
Nonstop2h 55m
Delta
Tue 5/266:57 pm
STL
- JFK
1 stop5h 09m
Delta
Deal found 3/14![Delta logo]()
$396
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Fri 4/109:59 pm
EWR
- STL
Nonstop2h 58m
United Airlines
Sun 4/126:15 am
STL
- EWR
Nonstop2h 36m
United Airlines
Deal found 3/12![United Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 3/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/94:15 pm
JFK
- STL
1 stop5h 27m
Delta
Mon 4/1310:50 am
STL
- JFK
1 stop6h 55m
Delta
Deal found 3/12![Delta logo]()
$397
Last-minute flights to St. CharlesDiscover last-minute flight deals to St. Charles. Data last updated March 16, 2026 and is based on user searches.
Discover last-minute flight deals to St. Charles. Data last updated March 16, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 3/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/236:00 am
JFK
- STL
1 stop8h 34m
Frontier
Tue 3/244:51 pm
STL
- JFK
1 stop18h 25m
Frontier
Deal found 3/14![Frontier logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/711:30 am
JFK
- STL
2 stops12h 55m
Frontier
Thu 4/96:29 pm
STL
- JFK
1 stop5h 51m
Frontier
Deal found 3/13![Frontier logo]()
$290
This Southwest deal was found by Cheapflights users on 3/12. 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 4/712:00 pm
LGA
- STL
Nonstop2h 50m
Southwest
Thu 4/95:40 am
STL
- LGA
1 stop4h 35m
Southwest
Deal found 3/12![Southwest logo]()
$294
This Southwest deal was found by Cheapflights users on 3/12. 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 4/812:00 pm
LGA
- STL
Nonstop2h 50m
Southwest
Sat 4/116:00 am
STL
- LGA
Nonstop2h 20m
Southwest
Deal found 3/12![Southwest logo]()
$284
This Southwest deal was found by Cheapflights users on 3/16. 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 4/86:00 am
LGA
- STL
1 stop6h 30m
Southwest
Wed 4/81:25 pm
STL
- LGA
1 stop7h 00m
Southwest
Deal found 3/16![Southwest logo]()
$293
This Southwest deal was found by Cheapflights users on 3/12. 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 4/93:00 pm
LGA
- STL
Nonstop2h 50m
Southwest
Mon 4/138:00 pm
STL
- LGA
Nonstop2h 25m
Southwest
Deal found 3/12![Southwest logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/109:59 am
LGA
- STL
2 stops14h 59m
Multiple Airlines
Wed 4/158:23 pm
STL
- LGA
1 stop20h 22m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$285
This Frontier deal was found by Cheapflights users on 3/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:28 pm
LGA
- STL
1 stop12h 23m
Frontier
Fri 4/178:39 am
STL
- LGA
1 stop12h 25m
Frontier
Deal found 3/12![Frontier logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/101:14 pm
JFK
- STL
1 stop11h 44m
Frontier
Tue 4/144:59 pm
STL
- JFK
2 stops17h 51m
Frontier
Deal found 3/12![Frontier logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/131:14 pm
JFK
- STL
1 stop11h 11m
Frontier
Mon 4/208:23 pm
STL
- JFK
1 stop14h 27m
Frontier
Deal found 3/14![Frontier logo]()
$285
This Flightnetwork deal was found by Cheapflights users on 3/15. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:25 pm
LGA
- STL
1 stop27h 54m
Frontier
Mon 4/204:59 pm
STL
- LGA
1 stop22h 05m
Frontier
Deal found 3/15![Frontier logo]()
$288
This CheapOair deal was found by Cheapflights users on 3/16. 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 4/228:25 pm
LGA
- STL
1 stop27h 54m
Frontier
Fri 4/244:59 pm
STL
- LGA
1 stop22h 05m
Frontier
Deal found 3/16![Frontier logo]()
$291
One-way flights to St. CharlesSearch for one-way flight options to St. Charles. Find affordable one-way fares based on user searches. Data last updated March 16, 2026.
Search for one-way flight options to St. Charles. Find affordable one-way fares based on user searches. Data last updated March 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/1410:29 pm
EWR
- STL
1 stop9h 21m
Frontier
Deal found 3/15![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 3/13. 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 4/165:59 am
EWR
- STL
1 stop5h 31m
Frontier
Deal found 3/13![Frontier logo]()
$90
This Booking.com deal was found by Cheapflights users on 3/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:59 am
EWR
- STL
1 stop5h 31m
Frontier
Deal found 3/13![Frontier logo]()
$91
This Orbitz deal was found by Cheapflights users on 3/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:29 pm
EWR
- STL
1 stop9h 21m
Frontier
Deal found 3/13![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/148:02 am
EWR
- STL
2 stops23h 48m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$103
This Frontier deal was found by Cheapflights users on 3/15. 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.
Tue 4/75:59 am
EWR
- STL
1 stop5h 31m
Frontier
Deal found 3/15![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/295:59 am
EWR
- STL
1 stop29h 27m
Frontier
Deal found 3/14![Frontier logo]()
$114
This Expedia deal was found by Cheapflights users on 3/15. 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.
Sun 4/55:59 am
EWR
- STL
1 stop5h 31m
Frontier
Deal found 3/15![Frontier logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/610:29 pm
EWR
- STL
1 stop13h 01m
Frontier
Deal found 3/14![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 5/81:00 pm
JFK
- STL
2 stops31h 23m
Frontier
Deal found 3/12![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/1911:45 am
SWF
- STL
2 stops20h 05m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$147
This Delta deal was found by Cheapflights users on 3/13. 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 6/910:00 am
LGA
- STL
Nonstop2h 54m
Delta
Deal found 3/13![Delta logo]()
$147
Find flight deals to St. Charles
Find the latest flights to St. Charles in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 2,558,603 searches and data was last updated on March 16, 2026.
Popular in | November |
|---|---|
Cheapest in | August |
Average price | $361 |
Round-trip from | $284 |
One-way from | $80 |
Cheapflights Fare Finder
Locate flights to St. Charles that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 2,558,603 searches and data was last updated on March 16, 2026.
Use the filters below to find and compare flights to St. Charles that are best for you.
Fly from
Route
Depart
Return
Cheapest round-trip
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Wed 4/22
5:30 pm-7:25 pm
Nonstop2h 55m
Lambert-St Louis
Fri 4/24
8:00 pm-11:25 pm
Nonstop2h 25m
$295
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Wed 4/29
5:30 pm-7:25 pm
Nonstop2h 55m
Lambert-St Louis
Mon 5/4
8:00 pm-11:25 pm
Nonstop2h 25m
$315
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Mon 4/27
6:30 am-1:10 pm
1 stop7h 40m
Lambert-St Louis
Fri 5/1
5:50 am-9:10 am
Nonstop2h 20m
$316
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Fri 7/17
6:59 am-8:44 am
Nonstop2h 45m
Lambert-St Louis
Mon 7/20
6:00 am-9:27 am
Nonstop2h 27m
$317
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Fri 5/8
6:35 pm-8:30 pm
Nonstop2h 55m
Lambert-St Louis
Sun 5/10
7:55 pm-11:20 pm
Nonstop2h 25m
$317
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Tue 5/5
5:00 pm-9:19 pm
1 stop5h 19m
Lambert-St Louis
Fri 5/8
5:15 pm-11:18 pm
1 stop5h 03m
$325
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Thu 7/16
6:59 am-8:44 am
Nonstop2h 45m
Lambert-St Louis
Sun 7/19
9:00 am-12:28 pm
Nonstop2h 28m
$337
New YorkSt. Louis
JFK - STL
JFKSTL
New York John F Kennedy Intl
Mon 5/4
6:35 pm-11:36 pm
1 stop6h 01m
Lambert-St Louis
Thu 5/7
7:01 pm-1:06 am
1 stop5h 05m
$337
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Wed 6/24
6:30 am-8:05 am
Nonstop2h 35m
Lambert-St Louis
Thu 6/25
7:55 pm-11:20 pm
Nonstop2h 25m
$337
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Mon 6/8
8:55 am-10:45 am
Nonstop2h 50m
Lambert-St Louis
Sat 6/13
12:50 pm-7:35 pm
1 stop5h 45m
$338
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight to St. Charles
Have a flexible travel schedule? Discover the best time to fly to St. Charles with our price prediction graph.
LGA-STL
EWR-STL
JFK-STL
SWF-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 to St. Charles
NYC-CH5
LGA-STL
EWR-STL
JFK-STL
SWF-STL
When is the best time to book a flight to St. Charles?
Use this chart to determine the optimal time to book a round-trip flight from New York to St. Charles. Price data was last updated on March 13, 2026.
The best time to book flights to St. Charles is 79 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.
How long is the flight to St. Charles?
On average, a flight from New York to St. Charles takes 5 hours 3 minutes. Flights to St. Charles from other popular cities in USA will vary in length. Below are a few examples of popular routes and their flight times.
When is the cheapest time to fly to St. Charles?
Use this chart to determine the cheapest time to fly round-trip from New York to St. Charles. Price data was last updated on March 14, 2026.
Users looking for the lowest fares to St. Charles should consider flying on Saturday evenings, when prices are typically cheapest. Budget-minded travelers will want to avoid Sunday afternoons, when prices are usually at their highest.
Weekly flight availability to St. Charles
The most flights from New York to St. Charles are scheduled on a Monday (20 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).
What are the most popular airlines that fly to St. Charles?
The most popular airlines flying from New York to St. Charles are United Airlines, Delta and American Airlines.
What are the cheapest airlines that fly to St. Charles?
The cheapest airlines flying from New York to St. Charles are Frontier, Delta and Southwest.
Rainfall in St. Charles by month
Plan your trip to St. Charles by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in St. Charles ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Charles when rainfall is around 2.2 in.
Temperature in St. Charles by month
Plan your trip to St. Charles by taking into account the average temperature totals by month.
If weather is an important factor for your trip to St. Charles, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).
Reviews of airlines servicing St. Charles
Get insights into the airlines that provide service to St. Charles. 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. Charles. Reviews last updated March 16, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines to the United States. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
FAQs about flying to St. Charles
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