JAX offers quick screening times at TSA and easy check-in, making it convenient for early morning departures.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $199 (Kiwi.com) |
One-way from | $84 (Trip.com) |
Popular in | March |
Cheapest in | July |
Average price | $389 |
Good round-trip deal | $365 or less |
Good one-way deal | $242 or less |
Fly from
Fly to
Route
Depart
Return
Price
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Tue 2/24
7:04 pm-11:36 pm
1 stop5h 32m
Lambert-St Louis
Thu 2/26
6:10 am-2:10 pm
1 stop7h 00m
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Thu 2/26
5:30 am-9:06 am
1 stop4h 36m
Lambert-St Louis
Tue 3/3
6:00 am-12:17 pm
1 stop5h 17m
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Mon 2/23
5:58 pm-8:41 pm
1 stop3h 43m
Lambert-St Louis
Tue 3/3
5:00 pm-10:58 pm
1 stop4h 58m
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Tue 2/24
6:30 am-11:02 am
1 stop5h 32m
Lambert-St Louis
Sat 2/28
10:11 am-2:49 pm
1 stop3h 38m
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Thu 1/29
4:38 pm-10:58 pm
1 stop7h 20m
Lambert-St Louis
Mon 2/2
3:11 pm-9:44 pm
1 stop5h 33m
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Thu 2/26
5:30 am-9:06 am
1 stop4h 36m
Lambert-St Louis
Mon 3/2
10:13 am-2:56 pm
1 stop3h 43m
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Thu 2/26
5:30 am-9:06 am
1 stop4h 36m
Lambert-St Louis
Thu 2/26
6:47 pm-12:01 am
1 stop4h 14m
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Mon 2/23
7:04 pm-11:36 pm
1 stop5h 32m
Lambert-St Louis
Thu 2/26
6:47 pm-12:01 am
1 stop4h 14m
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Tue 2/24
11:28 am-2:47 pm
1 stop4h 19m
Lambert-St Louis
Fri 2/27
3:47 pm-9:52 pm
1 stop5h 05m
JacksonvilleSt. Louis
JAX - STL
JAXSTL
Jacksonville
Fri 2/27
11:28 am-2:47 pm
1 stop4h 19m
Lambert-St Louis
Wed 3/4
1:13 pm-10:03 pm
1 stop7h 50m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
The best time to book flights from Jacksonville to St. Louis is 29 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.
Currently, April is the cheapest month in which you can book a flight from Jacksonville to St. Louis (average of $139). Flying from Jacksonville to St. Louis in November is currently the most expensive (average of $259). 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.
When flying from Jacksonville to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 17% versus a flight at noon.
Travelers seeking maximum savings on their Jacksonville to St. Louis flight should consider departing on Friday afternoons when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$194 | Average$269 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$214 | Average$308 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$218 | Average$305 | FlexibilityNo cancel fee | On-time71% |