Cheap Flights to Roundup

View ₩737,400 flight on Thu, Sep 11, 2025Opens in a new window

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How much is the cheapest flight to Roundup?

Prices were available within the past 7 days and start at ₩737,400 for one-way flights and ₩919,600 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Sep 11 - Thu, Sep 25
ICN
Seoul
BIL
Billings
₩919,600 Roundtrip, found 11 hours ago
₩919,600
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Sep 11 from Seoul to Billings, returning Thu, Sep 25, priced at ₩919,600 found 11 hours ago
American Airlines
Thu, Sep 11 - Thu, Sep 25
ICN
Seoul
BIL
Billings
₩1,239,200 Roundtrip, found 11 hours ago
₩1,239,200
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Thu, Sep 11 from Seoul to Billings, returning Thu, Sep 25, priced at ₩1,239,200 found 11 hours ago
Hawaiian Airlines
Mon, Dec 1 - Fri, Dec 12
ICN
Seoul
BIL
Billings
₩1,452,500 Roundtrip, found 12 hours ago
₩1,452,500
Roundtrip
found 12 hours ago
Select Hawaiian Airlines flight, departing Mon, Dec 1 from Seoul to Billings, returning Fri, Dec 12, priced at ₩1,452,500 found 12 hours ago
EVA Airways
Thu, Sep 11 - Thu, Sep 25
ICN
Seoul
BIL
Billings
₩1,612,000 Roundtrip, found 11 hours ago
₩1,612,000
Roundtrip
found 11 hours ago
Select EVA Airways flight, departing Thu, Sep 11 from Seoul to Billings, returning Thu, Sep 25, priced at ₩1,612,000 found 11 hours ago
Air Canada
Thu, Sep 11 - Thu, Sep 25
ICN
Seoul
BIL
Billings
₩1,711,300 Roundtrip, found 11 hours ago
₩1,711,300
Roundtrip
found 11 hours ago
Select Air Canada flight, departing Thu, Sep 11 from Seoul to Billings, returning Thu, Sep 25, priced at ₩1,711,300 found 11 hours ago

Find the cheapest month to fly from Columbus (CMH) to Billings (BIL)

January is typically the cheapest month to fly

From ₩417,058 - ₩1,505,711 per traveler.

Graph displaying average flight prices per month

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.

Flights to Roundup information
Destination airport
Logan Intl.
Destination airport IATA code
BIL
Destination city name
Billings
Roundtrip price
₩919,600

Trending flights to Roundup

Prices were available within the past 7 days and start at ₩737,400 for one-way flights and ₩919,600 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Sep 11 - Thu, Sep 25
ICN
Seoul
BIL
Billings
₩919,600 Roundtrip, found 11 hours ago
₩919,600
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Sep 11 from Seoul to Billings, returning Thu, Sep 25, priced at ₩919,600 found 11 hours ago
*Available to Expedia members.