$135 Cheap United flights Missoula (MSO) to Chicago (ORD)

Landing cheap one-way United Airlines flights from MSO to ORD from $135 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Alternatively, check out our affordable return fares from $242 for your next break.**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.

Browse for one-way or round-trip flights to Chicago in January or February. You could find a cheap fare with United Airlines during these off-peak times.

Start searching one to three months ahead of your departure date to score cheap fares on United Airlines flights from Missoula Intl. Airport (MSO) to O’Hare Intl. Airport (ORD). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing right, and you can enjoy significant savings on domestic journeys.*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.

To see if there’s a direct trip from MSO to ORD with United Airlines or other carriers, check the “Nonstop” box when searching for tickets.

Search United Airlines’s earliest flights from MSO to ORD by using our “Early Morning” and “Morning” filters. Not only will you arrive sooner, early departures also experience 20% fewer 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.

Hop on a United Airlines flight from Missoula Intl. Airport (MSO) to Chicago, and you’ll probably come in to O’Hare Intl. Airport (ORD). This is the airline’s main hub in this destination.

With a rewarding loyalty program, United Airlines is a top choice for many passengers departing from MSO to ORD. Plus, if you’re a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Typically, you can cancel or reschedule your flight, although additional charges may apply if you made your booking over 24 hours ago. Want to keep your options open? Apply the “No cancel fee” and “Changes included” filters to find flights that won’t charge you extra if you have to alter your plans. To make changes, head to “Trips,” select your flight and click on “Manage Booking” for further information.