Cheap flights from Portland, OR to St. Louis, MO

Flights starting at £54. Choose between Alaska Airlines, United Airlines, or Frontier Airlines to find the best price.

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Tips to know when travelling to St. Louis

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The most popular airlines for this route are Alaska Airlines, United Airlines, Frontier Airlines, Spirit Airlines, and Sun Country Airlines. Portland and St. Louis have 168 direct flights per week.

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

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Alaska AirlinesASAASNoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Sun Country AirlinesSCXSYYesNo

St. Louis travel tips

1) Spend time at Grant’s Farm, a longtime landmark in Grantwood Village in St. Louis
2) Do you like motorcycles and speed? Visit the St. Louis Moto Museum
3) Want to have some fun in the evening? Head to the partying areas of St. Louis

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
261
days per year
Snow days
9
days per year

14 day forecast

Tuesday
20 Feb
16°C2°C
27 Feb
88%
21°C12°C
Wednesday
21 Feb
18°C7°C
28 Feb
10°C5°C
Thursday
22 Feb
86%
16°C10°C
29 Feb
14°C4°C
Friday
23 Feb
13°C5°C
1 Mar
10°C-1°C
Saturday
24 Feb
12°C4°C
2 Mar
18°C3°C
Sunday
25 Feb
18°C8°C
3 Mar
20°C7°C
Monday
26 Feb
20°C9°C
4 Mar
20°C8°C

Frequently asked questions

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