Cheap Flights from Idaho Falls to Seattle / Tacoma International

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Flight deals from Idaho Falls to Seattle / Tacoma International

Looking for a cheap last-minute deal or the best return flight from Idaho Falls to Seattle / Tacoma International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Idaho Falls to Seattle / Tacoma International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Idaho Falls to Seattle / Tacoma International flights are currently cheapest in August.

Direct flights from Idaho Falls to Seattle / Tacoma International

Idaho Falls to Seattle / Tacoma International: Alternative routes

Compare routes from Idaho Falls to Seattle below. You may find an airport to fly into that's cheaper, faster, or easier than Seattle / Tacoma International.

Idaho Falls to Seattle: Flight information

The things to know before you go.
Cheapest flight foundR 1,956
Cheapest month to flyAugust
Average flight time1 hr, 59 mins
Most popular airlineAlaska Airlines
Average flights per week49

Finding cheap flights from Idaho Falls to Seattle / Tacoma International: Frequently asked questions

The best price we found for a return flight from Idaho Falls to Seattle / Tacoma International is R 3,742. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 59 minutes is the average flight time from Idaho Falls to Seattle / Tacoma International.
Alaska Airlines, Hawaiian Airlines and Horizon Air fly direct from Idaho Falls to Seattle / Tacoma International.
As of June 2025, there are 49 flights per week flying from Idaho Falls to Seattle / Tacoma International.
The cheapest month to fly from Idaho Falls to Seattle / Tacoma International is usually June 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Idaho Falls Airport to Seattle / Tacoma International Airport on Tuesday, 14 October 2025.
Yes – the average flight time is 1 hour and 59 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle / Tacoma International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Alaska Airlines offers the cheapest flight tickets to Seattle / Tacoma International.

Travelling from Idaho Falls Regional Airport (IDA) to Seattle-Tacoma International Airport (SEA): what you need to know

  • The average duration of a direct flight from Idaho Falls Regional Airport to Seattle-Tacoma International Airport is 2 hours.

  • Seattle is one hour behind Idaho Falls and observes the UTC-7 timezone.

  • Each week, there are 11 Idaho Falls Regional Airport to Seattle-Tacoma International Airport flights. If you'd like to jet off as early as possible, take the 06:00 Alaska Airlines flight. If you'd rather make the most of your day before you fly, the last flight is at 16:20 with Alaska Airlines.

  • To ensure you get on your IDA to SEA flight, allow plenty of time to check in and find your gate. Turning up two hours before international departures and one hour before domestic flights is the general rule.

  • Flying during a peak month such as July? School holidays and other high seasons can result in longer queues at check-in and security. Play things extra safe and get there up to four hours ahead of an international flight and two hours before domestic departures.

  • Jetting into Seattle (and then exploring more of United States!) is a breeze with Alaska Airlines. This popular airline offers direct flights from Idaho Falls Regional Airport to Seattle-Tacoma International Airport.

  • Most passengers choose to travel with Alaska Airlines on this route.

  • The most punctual carrier operating IDA to SEA flights is Alaska Airlines. Its services arrive as planned 73.64% of the time.

  • If you want to break up your flight, simply deselect 'Direct flights only' when searching for your ticket from Idaho Falls Regional Airport to Seattle-Tacoma International Airport. These are the top stopovers between IDA and SEA:

    • Salt Lake City International Airport

    • Metropolitan Oakland International Airport

    • Denver International Airport

How to find the cheapest flights from Idaho Falls Regional Airport (IDA) to Seattle-Tacoma International Airport (SEA)

  • R 1,956 is the best price for a one-way Idaho Falls Regional Airport to Seattle-Tacoma International Airport flight. A return flight starts from R 3,742. These fares may change depending on availability and demand.

  • Score cheap tickets from IDA to SEA by booking 11 months ahead. Based on our research, that's the sweet spot for finding the biggest deals.

  • Schedule your trip for October. That's the cheapest month for flights from Idaho Falls Regional Airport to Seattle-Tacoma International Airport. If your travel dates are flexible, use the 'Whole month' tool to see the cheapest airfare across every month.

  • Save time searching for cheap flights from IDA to SEA by creating a Price Alert. You'll get an email or push notification on the app when a new discounted fare appears.

  • Secure the perfect flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from Idaho Falls Regional Airport to Seattle-Tacoma International Airport, use the 'Sort by' function. You can also filter by airline, arrival and departure times, and number of stops.

Handy information about Idaho Falls Regional Airport (IDA)

  • You'll find IDA at 2140 North Skyline.

  • Idaho Falls Regional Airport maintains a strong on-time record, so you're less likely to experience disruptions. Departures from IDA make it to their destination as scheduled 80.03% of the time.

  • To get to Idaho Falls Regional Airport from central Idaho Falls, it'll take about 10 minutes if you're going by car. Of course, this depends on traffic conditions. It's approximately 5 kilometres from the airport to the city centre.

  • You can expect a trip time of around 1 hour on public transport.

  • Get your travels off to a leisurely start by staying near IDA. Whether you're catching an early flight from Idaho Falls Regional Airport to Seattle-Tacoma International Airport or want to avoid feeling rushed, these stays are ideal:

Arriving at Seattle-Tacoma International Airport (SEA)

Getting from Seattle-Tacoma International Airport (SEA) to central Seattle

  • Seattle-Tacoma International Airport to central Seattle has a drive time of about 20 minutes. It's approximately 23 kilometres away.

  • If you're using public transport, expect a journey of about 55 minutes.

When to fly to Seattle-Tacoma International Airport (SEA)

  • It's time to plan your dates for your flight from Idaho Falls Regional Airport to Seattle-Tacoma International Airport. July is the most popular month to head to Seattle. If you want a more laid-back vibe, go in May.

  • When booking your flight from Idaho Falls Regional Airport to Seattle-Tacoma International Airport, think about the type of weather you enjoy. August is the warmest month in Seattle, with the temperature ranging from 12ºC (54ºF) to 28ºC (82ºF).

  • If you want cooler conditions, search for a cheap ticket from IDA to SEA in February. Temperatures average between -1ºC (30ºF) and 11ºC (52ºF) then.

Explore more of United States

  • You've visited Seattle, now it's time to discover other parts of United States. Journey about 241 kilometres south to Portland to check off its top attractions. From Pioneer Courthouse Square to Portland Japanese Garden and Pittock Mansion, there's plenty to keep you on the go.

  • If you're looking to explore another well-known destination in United States, consider Spokane, about 370 kilometres east of Seattle. Manito Park, Northwest Museum of Arts & Culture and Spokane Falls are key highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.