Portland (PDX) to Indianapolis (IND): 1,872 miles (3,013 km) great-circle, about 4h 15m nonstop by our estimate. Cheapest fare observed: $387 round-trip on Frontier, with 1 stop, departing May 7, 2026.
$387 round-trip, Frontier F91104, departing 2026-05-07 at 21:46, returning 2026-06-17. The recorded itinerary left on a Thursday, returning on a Wednesday 41 nights later; the fare was observed 12 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $387, it ranked 16th of the 30 round-trip fares we recorded from PDX (median $378). That is 20.7 cents per great-circle mile (round-trip price over one-way distance), close to the PDX median of 21.2 cents across 30 round-trip routes.
Routes from PDX of similar length: Houston (1,842 mi) at $249 and Louisville (1,946 mi) at $335.
Frontier had the cheapest fare on 7 of 30 PDX routes. It is the 19th longest of the 30 routes we track from PDX.
Of 7 departure airports with a fare to Indianapolis, Portland (PDX) ranked 3rd at $387. Lowest: $219 from Orlando (MCO); highest: $639 from Panama City (PTY); 0 nonstop. Cheapest-fare airlines (routes): Frontier (3), American Airlines (1), Copa (1), Southwest (1) and Spirit (1).
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Los_Angeles, America/New_York; flight time is our estimate.