$121 Cheap United flights Missoula (MSO) to Phoenix (PHX)

View $121 flight on Thu, Jul 9, 2026Opens in a new window

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$121 Cheap United flights Missoula (MSO) to Phoenix (PHX)

Prices were available within the past 7 days and start at $121 for one-way flights and $241 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Sep 12 - Mon, Sep 15
MSO
Missoula
PHX
Phoenix
$241 Roundtrip, just found
$241
Roundtrip
just found
Select United flight, departing Fri, Sep 12 from Missoula to Phoenix, returning Mon, Sep 15, priced at $241 just found
United
Wed, Feb 4 - Mon, Feb 9
MSO
Missoula
PHX
Phoenix
$242 Roundtrip, found 9 hours ago
$242
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Feb 4 from Missoula to Phoenix, returning Mon, Feb 9, priced at $242 found 9 hours ago
United
Thu, Oct 2 - Tue, Oct 7
MSO
Missoula
PHX
Phoenix
$263 Roundtrip, found 1 day ago
$263
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 2 from Missoula to Phoenix, returning Tue, Oct 7, priced at $263 found 1 day ago
United
Thu, Oct 23 - Wed, Oct 29
MSO
Missoula
PHX
Phoenix
$264 Roundtrip, found 6 days ago
$264
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 23 from Missoula to Phoenix, returning Wed, Oct 29, priced at $264 found 6 days ago
United
Thu, Oct 30 - Wed, Nov 5
MSO
Missoula
PHX
Phoenix
$266 Roundtrip, found 12 hours ago
$266
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Oct 30 from Missoula to Phoenix, returning Wed, Nov 5, priced at $266 found 12 hours ago
United
Thu, Oct 2 - Tue, Oct 7
MSO
Missoula
PHX
Phoenix
$267 Roundtrip, found 1 day ago
$267
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 2 from Missoula to Phoenix, returning Tue, Oct 7, priced at $267 found 1 day ago
Flights from Missoula (MSO) to Phoenix (PHX)
Origin airport
Missoula Intl.
Destination airport
Sky Harbor Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, United
Popular airline
Alaska Airlines
Distance
937 mi

Frequently asked questions

How much is a United Airlines flight from Missoula Intl. Airport (MSO) to Sky Harbor Intl. Airport (PHX)?
You'll find cheap return United Airlines flights from $241 from MSO to PHX by filtering your results from "Price (lowest to highest)" on Expedia. Or look for bargains from $121 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from MSO to PHX with United Airlines?
Look for return or one-way flights to Phoenix in July or August. You could find a cheap fare with United Airlines during these quieter months.
What is the cheapest time to book flights from Missoula Intl. Airport (MSO) to Sky Harbor Intl. Airport (PHX) with United Airlines?
To find cheap United Airlines fares from Missoula Intl. Airport (MSO) to Sky Harbor Intl. Airport (PHX), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the overall cost. Sunday tends to be the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Missoula Intl. Airport (MSO) to Sky Harbor Intl. Airport (PHX)?
To find out if there's a direct trip from MSO to PHX with United Airlines or any other carriers, use our "Nonstop" filter when searching for flights.
What is the earliest United Airlines flight from MSO to PHX?
Sort your results by "Morning" and "Early Morning" to find the earliest flights from MSO to PHX. Leaving early means you're 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Phoenix?
Catch a United Airlines flight from Missoula Intl. Airport (MSO) to Phoenix, and you'll most likely arrive at Sky Harbor Intl. Airport (PHX). This is the airline's primary hub in this destination.
Why fly with United Airlines from MSO to PHX?
A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to leave from MSO to PHX with United Airlines. Plus, when you join Expedia's free One Key™ program, you can earn OneKeyCash™* alongside United Airlines's loyalty program earnings. It's yours to use wherever your next trip takes you.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Missoula Intl. Airport (MSO) to Sky Harbor Intl. Airport (PHX)?
Changes are typically free within 24 hours of making your booking, but your airline may charge you after that. For more details about altering your reservation, head to your "Trips," select your flight and click on "Manage Booking." If you'd like the freedom to adjust your plans without being charged, apply the "Changes included" or "No cancel fee" filter when organizing your next trip.

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