$690+ Cheap flights from Montana to Petersburg, AK (PSG)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — PSG
Dec 4 — Dec 111
1 adult, Economy
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1. Tell us where you want to go
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Keep the following information in mind while searching for Montana to Petersburg flight deals. Data was last updated November 4, 2025.
Round-trip from | $690 (Alaska Airlines) |
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Find flight deals from Montana to Petersburg
Best flights from Montana to PetersburgDiscover carefully curated flight deals from Montana to Petersburg that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 2025.
Discover carefully curated flight deals from Montana to Petersburg that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 2025.
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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.
Mon 4/206:35 amMSO - PSG
3 stops30h 17mAlaska Airlines
Fri 4/243:33 pmPSG - MSO
3 stops30h 22mAlaska Airlines
Deal found 11/2![Alaska Airlines logo]()
$690
Cheapflights Fare Finder
Customize your flight search to find flights from Montana to Petersburg that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 4, 2025.
Use the filters below to find and compare flights from Montana to Petersburg that are best for you.
Fly from
Montana
Fly to
Petersburg
Route
Depart
Return
Price
MissoulaPetersburg
MSO - PSG
MSOPSG
Missoula Johnson-Bell Field
Mon 4/20
6:35 am-10:52 am
3 stops30h 17m
Petersburg
Fri 4/24
3:33 pm-11:55 pm
3 stops30h 22m
$690
Best time to book a flight from Montana to Petersburg
Have a flexible travel schedule? Discover the best time to fly to Petersburg from Montana with our price prediction graph.
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 from Montana to Petersburg
What is the cheapest time of day to fly from MT to PSG?
Find hourly flight availability from Montana to Petersburg. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2025.
It’s optimal to fly from Montana to Petersburg, Alaska in the afternoon. By choosing this option you can save up to 41% on the cost of your flight, compared to a flight in the morning.