Cheap flights from Seattle to Idaho Falls

One-way fares from $209 · SEA → IDA · prices found by travellers in the last 48 hours

Compare all dates Idaho Falls → Seattle
Cheapest fare
$209

Frontier Airlines · Thu, Nov 12

Cheapest month
November

from $209

Direct flights
Not recently

Usually 1+ stop

Quickest trip
4h 35m

920 km

Get a price alert

We'll email you when Seattle → Idaho Falls drops to your price. It's free, and you can stop any time.

Today's cheapest fare is $209. We'll send one email to confirm. See our privacy policy.

Cheapest month to fly from Seattle to Idaho Falls

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 Cheapest $209

Cheapest dates in November 2026

The lowest fares we've seen for each day, cheapest first.

Frontier Airlines
Depart21:13 Thu, Nov 12SEA → IDA 4h 35m · 1 stop
$209one way, per person
View deal
See every date in November 2026 →

Plan the rest of your trip to Idaho Falls

Where to stay, what to do and getting around, from our travel partners.

Where to stay

Hotels in Idaho FallsCompare places to stay on Booking.com Find hotels →

Things to do

Things to do in Idaho FallsTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in Idaho FallsPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in Idaho FallsCompare rental cars from major brands on EconomyBookings Compare cars →

About flights from Seattle to Idaho Falls

Seattle (SEA) and Idaho Falls (IDA) are about 920 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 4h 35m. Over the next few months, one-way fares start from $209, and November 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Seattle to Idaho Falls?

The cheapest one-way fare we've seen recently is $209 with Frontier Airlines, departing Thursday, November 12, 2026.

What is the cheapest month to fly from Seattle to Idaho Falls?

November 2026 currently has the lowest fares, from $209 one way.

Are there direct flights from Seattle to Idaho Falls?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Seattle to Idaho Falls?

The quickest journey we've seen takes about 4h 35m. Seattle and Idaho Falls are around 920 km apart.

Which airlines fly from Seattle to Idaho Falls?

Recent fares on this route were with Frontier Airlines.

More cheap flights from Seattle

Compare flights to Idaho Falls from other cities →