Cheap flights from Belleville, IL to St. Louis, MO

Choose between Allegiant Air, Frontier Airlines, or Spirit Airlines to find the best price

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How much do flights to St. Louis cost?

Key info about flying to St. Louis

Depart from
MidAmerica St. Louis
Arrive to
St. Louis Lambert International
Average flights per week
47
Flight distance

Great deals from Belleville to St. Louis

Check-in for a flight from Belleville to St. Louis

NameCarrier codeIATA CodePassport needed during booking
Allegiant AirAAYG4No
Frontier AirlinesFFTF9No
Spirit AirlinesNKSNKNo
Alaska AirlinesASAASNo
Sun Country AirlinesSCXSYYes

Weather in St. Louis

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January3°C-3°C
February6°C-2°C
March13°C3°C
April18°C8°C
May24°C14°C
June29°C19°C
July31°C21°C
August30°C20°C
September27°C16°C
October20°C10°C
November12°C3°C
December7°C0°C
Hottest Month
31°C
July
Coldest month
-3°C
January
Sunny days
262
days per year
Snow days
9
days per year

14 day forecast

Wednesday
11 Dec
6°C-3°C
18 Dec
83%
6°C2°C
Thursday
12 Dec
6°C-4°C
19 Dec
35%
1°C0°C
Friday
13 Dec
3°C-4°C
20 Dec
3°C-1°C
Saturday
14 Dec
88%
7°C1°C
21 Dec
3°C-1°C
Sunday
15 Dec
12°C4°C
22 Dec
4°C-2°C
Monday
16 Dec
84%
16°C6°C
23 Dec
10°C0°C
Tuesday
17 Dec
6°C2°C
24 Dec
10°C3°C
The most popular airlines for this route are Allegiant Air, Frontier Airlines, Spirit Airlines, Alaska Airlines, and Sun Country Airlines. Belleville and St. Louis have 47 direct flights per week.

Frequently asked questions

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