Duluth International Airport to Sioux Flights from HKD 873 incl. tax

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Duluth to Sioux City is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

To find best deals on flights from Duluth to Sioux City, you can use various tools on HopeGoo: · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for Sioux City travel is around December. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Duluth to Sioux City is September, when demand for travel is lower.

After crunching the numbers on our March flight calendar, it's currently cheapest to fly from Duluth to Sioux City on March 19, 2026 with United Airlines, with prices starting at US$738.

The time difference between Sioux City and Duluth is 0h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your HopeGoo, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.