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About About Trip.

Cheap Flights from Tri-Cities Regional to Duluth Intl. Prices were available within the past 7 days and starts atfor one-way flights and for round trip, for the period specified. Prices and availability are subject to change.

Scan through flights from Tri-Cities Regional Airport (TRI) to Duluth International Airport (DLH) for the upcoming week. Sort the list by any column, and click on a dollar sign to see the latest prices available for each flight. Search for cheap flights from Tri-Cities Regional (TRI) to Duluth Intl. (DLH) starting at. We offer cheap direct, non-stop flights including one way and roundtrip tickets.

Singapo Rediscovers Vouchers.

Compare & reserve one-way or return flights from Tri-Cities to Duluth fromonly to get the best flight deals and promotions for your TRI to DLH trip! Cheap Flights from Tri Cities Airport to Duluth. Prices shown are for 1 adult ticket including taxes & fees.(As ticket fares can change frequently, these advertised prices are for reference only. The actual prices will be shown at time of booking.). Duluth (DLH) to Tri-Cities Regional (TRI) flights The flight time between Duluth (DLH) and Tri-Cities Regional (TRI) is around 11h 4m and covers a distance of around miles.

This includes an average layover time of around 5h 58m. The fastest flight normally takes 6h 35m. Services are operated by Delta, United Airlines and American Airlines.