Popular airlines to Roundup
Alaska AirlinesAlaska Airlines
DeltaDelta
UnitedUnited
American AirlinesAmerican Airlines
Hawaiian AirlinesHawaiian Airlines
Air CanadaAir Canada
LufthansaLufthansa
- Plan, book, fly with confidence
- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 40% on select hotels after you book a flight*
Find the cheapest month to fly from Columbus (CMH) to Billings (BIL)
January is typically the cheapest month to fly
From ₩417,678 - ₩1,507,950 per traveler.
Searching for cheap flights to Roundup? No travel company presents more choices than Expedia if you're looking to compare flights to Roundup. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Montana. Expedia provides the cheapest flights to many destinations in Montana and you may find even greater savings if you combine your flight with a hotel stay in Roundup.
Destination airport | Roundup |
Destination airport IATA code | BIL |
Get up to 100% off your flight to Roundup when booking a Flight + Hotel
Heading to Roundup? Explore Roundup with Expedia's Travel Guides to find the best hotels, vacation packages, car rental deals and more!
Top Flight Destinations
*Available to Expedia members.