Cheap flights from Great Falls, MT to Portland, OR

Flights starting at $136. Choose between Alaska Airlines, Allegiant Air, or Frontier Airlines to find the best price.

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The most popular airlines for this route are Alaska Airlines, Allegiant Air, Frontier Airlines, Spirit Airlines, and United Airlines. Great Falls and Portland have 66 direct flights per week.

Check-in for a flight from Great Falls to Portland

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Alaska AirlinesASAASNoOpens 24 days before flight
Closes 1 hours before flight
Allegiant AirAAYG4NoOpens 24 days before flight
Closes 1 hours before flight
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo

Weather in Portland

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January8°C2°C
February8°C2°C
March11°C3°C
April14°C5°C
May19°C8°C
June23°C10°C
July28°C13°C
August28°C14°C
September24°C12°C
October17°C8°C
November10°C4°C
December7°C2°C
Hottest Month
28°C
August
Coldest month
2°C
December
Sunny days
259
days per year
Snow days
5
days per year

14 day forecast

Monday
18 Mar
22°C9°C
25 Mar
14°C6°C
Tuesday
19 Mar
89%
21°C10°C
26 Mar
13°C5°C
Wednesday
20 Mar
87%
14°C8°C
27 Mar
89%
15°C7°C
Thursday
21 Mar
88%
15°C9°C
28 Mar
81%
12°C7°C
Friday
22 Mar
73%
15°C8°C
29 Mar
88%
9°C4°C
Saturday
23 Mar
89%
13°C8°C
30 Mar
89%
12°C4°C
Sunday
24 Mar
87%
14°C6°C
31 Mar
82%
8°C3°C

Frequently asked questions

What are the most popular routes to and from Great Falls?
What are the most popular routes to and from Portland?
What airports are near Great Falls?
What airports are near Portland?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Great Falls and Portland?
What is Virtual Interlining and how do I use it?
Which airlines fly between Great Falls and Portland?
When's the best time to travel between Great Falls and Portland?
What flights operate between Great Falls and Portland?
How many airports are there near Great Falls?
How many airports are there near Portland?
What time do nonstop (direct) flights between Great Falls and Portland depart?
What time do nonstop (direct) flights between Great Falls and Portland arrive?
What time do flights between Great Falls and Portland depart?
What time do flights between Great Falls and Portland arrive?

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