Cheap flights from Illinois to Duluth from $231

The cheapest month to fly to Duluth from Illinois is in April. Flight prices, which tend to average around $298, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Duluth from Illinois during May instead. Flights to Duluth in May, while not as cheap as those in April, still average around $353.

The cheapest day to depart from Illinois to Duluth is on a Saturday when prices can be found for as low as $298. On the other hand, Monday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $577.

Flying to Duluth from Illinois in the evening is the least expensive time of day to depart. momondo users have found prices as low as $323 when looking at flights departing in the evening. In contrast, the most expensive time of day to depart to Duluth is in the morning when prices are around $424.

Fly from Chicago O'Hare Intl to Duluth Intl for the best Illinois - Duluth Intl flight prices

There is only 1 cabin class available to choose from on Illinois to Duluth flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 6% on your flight if you consider stops on a Illinois to Duluth flight.

As of October 2026, 6 flights take off from Illinois and land in Duluth each day. The most common flight departure time for this route is 4:00PM, with 59% of daily flights taking off in the afternoon.

As of October 2026, 43 flights take off from Illinois and land in Duluth each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.