$158 Find Cheap Flights from Idaho Falls to Seattle - Compare and Save

Among airlines operating Idaho Falls to Seattle flights:

• Alaska Airlines: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only Alaska Airlines operates flights between Idaho Falls and Seattle.

Flights from Idaho Falls to Seattle usually depart from Idaho Falls Fanning Field (IDA) and arrive at Seattle/Tacoma Intl (SEA).

Here are some options for this route, based on selected ticket types and cabin classes:

• Alaska Airlines: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Only Economy Class is available on flights from Idaho Falls to Seattle.

On this route, nonstop flights are cheaper than layover options on average. Nonstop fares average $333 round-trip, compared to $461 via a layover through Portland (PDX).

The Embraer 175 family is used most often on this route, operated mainly by Hawaiian Airlines and Alaska Airlines. Other aircraft seen on the route include Canadair (Bombardier) Regional Jet 700 variants.

Connecting flights from Idaho Falls to Seattle most commonly pass through:

• Salt Lake City (SLC) - 90% of one-stop connections
• Portland (PDX) - 10% of one-stop connections
Together, these airports account for 100% of one-stop bookings on this route.

Yes. Being flexible with your travel dates can save you up to 19% on the Idaho Falls to Seattle route. Wednesday is the cheapest departure day at $307 round-trip on average, while Monday is the most expensive at $377, a difference of $70. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on Idaho Falls to Seattle flights, with 50% of flights leaving in that window. Afternoon departures account for 50%, evening flights for 0%, and night flights for 0%.

Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

These are the earliest and latest flight times available from Idaho Falls to Seattle:

• Earliest: departs at 6:02 am and lands at 8:09 am
• Latest: departs at 4:03 pm and lands at 6:10 pm.

The flight takes about 2h 07m.

Last-minute fares on this route - booked within 2 weeks of departure - run 66% above the route average of $337. Book 4 weeks before departure for the lowest fares.

A nonstop flight from Idaho Falls to Seattle takes 2h 07m, covering 565 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $267 to $2,423. That means the highest observed fare was about 9x higher than the lowest one.

One-way fares from Idaho Falls to Seattle are currently higher than usual. Average one-way flight prices are about $241, which is 11% above the typical average for this route.

Flying via Portland (PDX) gives the shortest average 1-stop total travel time at 4h 20m, compared with 4h 57m via Salt Lake City (SLC).

Seattle is 1 hour behind Idaho Falls (Pacific Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:
• Fox
• Europcar
• Thrifty
• Budget
• Dollar

Round-trip flights from Idaho Falls to Seattle range from $285 to $443, with an average of $337 over the past 12 months. Anything below $285 counts as a good deal.

Alaska Airlines is the only airline on the Idaho Falls to Seattle route offering in-flight Wi-Fi. Pricing depends on fare class.