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Cheap Flights from Portland to Sioux Falls

Explore the cheapest flights from Portland to Sioux Falls in the next three months. Based on Trip.com's data from the latest 7 days, one-way fares start at TWD 10,457, and round-trip tickets start at TWD 28,575.

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flying from Portland to Sioux Falls

The distance between Portland and Sioux Falls is approximately 2,118.93km. Based on Trip.com's data, travel demand peaks in August. The off-season for travel is October.

Cheapest one-way flight priceTWD 10,457
Cheapest return ticket priceTWD 28,575
Off-season for travelOctober
Peak season for travelAugust
Flight distance2,118.93km

Cheapest time to fly from Portland to Sioux Falls

The cheapest time for Portland to Sioux Falls flights: Jan 11 to Jan 18 — one way flight prices from TWD 6,969.

Cheapest flights
From price
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  • 714
  • 1421
  • 2128
  • Jan

    284
  • 411
  • 1118
  • 1825
  • Feb

    251
  • 18
  • 815
  • 1522
  • Mar

    221
Displayed prices are calculated based on the lowest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • Which airlines offer the cheapest flights from Portland (PWM) to Sioux Falls (FSD)?

    Based on Trip.com data, United Airlines offers one-way fares as low as TWD 10,457 on Cheapest nonstop routes (e.g. PWM to FSD on Thu, Dec 11), while United Airlines offers Cheapest nonstop round-trips from TWD 28,575 departing on Thu, Dec 25 and returning on Tue, Dec 30.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Portland to Sioux Falls 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 Portland to Sioux Falls, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, Dec 11, with one-way flights priced at just TWD 10,457.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Sioux Falls travel is around August.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Portland to Sioux Falls is October, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Portland to Sioux Falls on December 25, 2025 with United Airlines, with prices starting at TWD 28,574.
  • The time difference between Sioux Falls and Portland is 1h.
  • Tickets can only be changed or cancelled 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 booking, 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.