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Cheap flights from Seattle to Idaho Falls from $139

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Idaho Falls departing on 10/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:45 pm - 11:50 amSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
13h 05m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
6:21 pm - 6:36 pmIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
25h 15m2 stops Las Vegas Harry Reid Intl Los Angeles
$286Multiple Airlines
Thu, Sep 10 - Mon, Sep 14
Multiple Airlines Logo
9:45 pm - 12:04 pmSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
13h 19m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
6:21 pm - 9:42 amIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
16h 21m1 stop Las Vegas Harry Reid Intl
$290Multiple Airlines
Thu, Sep 17 - Mon, Sep 21
Alaska Airlines Logo
8:05 pm - 10:56 pmSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
1h 51mnonstop
Alaska Airlines Logo
6:09 am - 7:20 amIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
2h 11mnonstop
$297Alaska Airlines
Wed, Sep 30 - Sat, Oct 3
Alaska Airlines Logo
12:28 pm - 3:20 pmSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
1h 52mnonstop
Alaska Airlines Logo
6:09 am - 7:20 amIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
2h 11mnonstop
$297Alaska Airlines
Wed, Sep 30 - Sat, Oct 3
Alaska Airlines Logo
8:05 pm - 10:56 pmSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
1h 51mnonstop
Alaska Airlines Logo
6:18 am - 7:20 amIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
2h 02mnonstop
$297Alaska Airlines
Wed, Sep 16 - Wed, Sep 23
Alaska Airlines Logo
12:28 pm - 3:20 pmSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
1h 52mnonstop
Alaska Airlines Logo
6:18 am - 7:20 amIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
2h 02mnonstop
$297Alaska Airlines
Wed, Sep 16 - Wed, Sep 23
Alaska Airlines Logo
12:28 pm - 3:20 pmSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
1h 52mnonstop
Alaska Airlines Logo
6:18 am - 7:20 amIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
2h 02mnonstop
$297Alaska Airlines
Wed, Sep 16 - Tue, Sep 22
Multiple Airlines Logo
9:45 pm - 11:50 amSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
13h 05m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
6:21 pm - 9:42 amIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
16h 21m1 stop Las Vegas Harry Reid Intl
$300Multiple Airlines
Thu, Sep 10 - Mon, Sep 14
Multiple Airlines Logo
9:45 pm - 12:04 pmSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
13h 19m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
6:21 pm - 6:36 pmIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
25h 15m2 stops Las Vegas Harry Reid Intl Los Angeles
$310Multiple Airlines
Thu, Sep 17 - Mon, Sep 21
Alaska Airlines Logo
8:05 pm - 10:56 pmSEA  Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field
1h 51mnonstop
Alaska Airlines Logo
6:18 am - 7:20 amIDA  Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl
2h 02mnonstop
$317Alaska Airlines
Sat, Sep 26 - Mon, Sep 28

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Alaska Airlines flights from Seattle to Idaho Falls

Our best Alaska Airlines deals on Seattle to Idaho Falls flight tickets
Alaska Airlines
Sep 30
SEA8:05 pmSeattle/Tacoma Intl
1h 51m
IDA10:56 pmIdaho Falls Fanning Field
Oct 3
IDA6:09 amIdaho Falls Fanning Field
2h 11m
SEA7:20 amSeattle/Tacoma Intl
$297
Alaska Airlines
Nov 4
SEA8:05 pmSeattle/Tacoma Intl
1h 49m
IDA10:54 pmIdaho Falls Fanning Field
Nov 11
IDA6:04 amIdaho Falls Fanning Field
2h 16m
SEA7:20 amSeattle/Tacoma Intl
$305
Alaska Airlines
Oct 20
SEA7:20 amSeattle/Tacoma Intl
5h 01m
1 stop
IDA1:21 pmIdaho Falls Fanning Field
Oct 24
IDA1:58 pmIdaho Falls Fanning Field
2h 06m
SEA3:04 pmSeattle/Tacoma Intl
$307

Delta flights from Seattle to Idaho Falls

Our best Delta deals on Seattle to Idaho Falls flight tickets
Delta
Sep 2
SEA5:45 amSeattle/Tacoma Intl
4h 05m
1 stop
IDA10:50 amIdaho Falls Fanning Field
Sep 5
IDA3:17 pmIdaho Falls Fanning Field
4h 27m
1 stop
SEA6:44 pmSeattle/Tacoma Intl
$332
Delta
Sep 2
SEA5:45 amSeattle/Tacoma Intl
4h 05m
1 stop
IDA10:50 amIdaho Falls Fanning Field
Sep 5
IDA3:17 pmIdaho Falls Fanning Field
4h 27m
1 stop
SEA6:44 pmSeattle/Tacoma Intl
$357
Delta
Sep 16
SEA11:22 amSeattle/Tacoma Intl
5h 55m
1 stop
IDA6:17 pmIdaho Falls Fanning Field
Sep 23
IDA6:00 amIdaho Falls Fanning Field
3h 59m
1 stop
SEA8:59 amSeattle/Tacoma Intl
$368

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 10, 2026.
Use the filters below to find and compare flights from Seattle to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Thu 9/10

9:45 pm-11:50 am

1 stop13h 05m

Idaho Falls Fanning Field

Mon 9/14

6:21 pm-6:36 pm

2 stops25h 15m

$286

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Thu 9/17

9:45 pm-12:04 pm

1 stop13h 19m

Idaho Falls Fanning Field

Mon 9/21

6:21 pm-9:42 am

1 stop16h 21m

$290

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Wed 9/30

8:05 pm-10:56 pm

Nonstop1h 51m

Idaho Falls Fanning Field

Sat 10/3

6:09 am-7:20 am

Nonstop2h 11m

$297

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Wed 9/30

12:28 pm-3:20 pm

Nonstop1h 52m

Idaho Falls Fanning Field

Sat 10/3

6:09 am-7:20 am

Nonstop2h 11m

$297
Quickest round-trip

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Wed 9/16

8:05 pm-10:56 pm

Nonstop1h 51m

Idaho Falls Fanning Field

Wed 9/23

6:18 am-7:20 am

Nonstop2h 02m

$297

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Wed 9/16

12:28 pm-3:20 pm

Nonstop1h 52m

Idaho Falls Fanning Field

Wed 9/23

6:18 am-7:20 am

Nonstop2h 02m

$297

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Wed 9/16

12:28 pm-3:20 pm

Nonstop1h 52m

Idaho Falls Fanning Field

Tue 9/22

6:18 am-7:20 am

Nonstop2h 02m

$297

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Thu 9/10

9:45 pm-11:50 am

1 stop13h 05m

Idaho Falls Fanning Field

Mon 9/14

6:21 pm-9:42 am

1 stop16h 21m

$300

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Thu 9/17

9:45 pm-12:04 pm

1 stop13h 19m

Idaho Falls Fanning Field

Mon 9/21

6:21 pm-6:36 pm

2 stops25h 15m

$310

SeattleIdaho Falls

SEA Seattle/Tacoma Intl - IDA Idaho Falls Fanning Field

SEAIDA

Seattle/Tacoma Intl

Sat 9/26

8:05 pm-10:56 pm

Nonstop1h 51m

Idaho Falls Fanning Field

Mon 9/28

6:18 am-7:20 am

Nonstop2h 02m

$317

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Idaho Falls from

How to get the cheapest flight ticket from Seattle to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Idaho Falls?

Prices are currently low for flights on this route.

Typical prices usually range from $317 to $567.
The lowest price recently found on this route was $286.

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $212.

What is the cheapest day to depart on your flight to Idaho Falls?

Our data shows that Thursday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $297. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Tuesday is $488.

What is the cheapest time of day to depart on your flight to Idaho Falls?

Our most recent data shows that the best time of day to fly to Idaho Falls is in the afternoon. Flights from Seattle to Idaho Falls during this time can be as low as $297. Try not to purchase tickets in the evening because they tend to be around $342. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Seattle/Tacoma Intl to Idaho Falls Fanning Field flight route?

Fly from Seattle/Tacoma Intl to Idaho Falls Fanning Field for the best Seattle/Tacoma Intl - Idaho Falls Fanning Field flight prices

What cabin class options are available on Seattle to Idaho Falls flights?

There are 4 cabin classes available to choose from on Seattle to Idaho Falls flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Idaho Falls flights?

You could potentially save up to 41% on your flight if you consider stops on a Seattle to Idaho Falls flight.

How have Seattle to Idaho Falls flight prices changed over time?

As of August 2026, prices for Seattle to Idaho Falls flights are approximately 55% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Idaho Falls

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Idaho Falls according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Idaho Falls (SEA to IDA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Idaho Falls

Best Price Found

$639

Fastest flight time

1h 49m

Direct flights

Every day

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from Seattle in the past 72 hours is $639. The best round-trip flight deal from Seattle to Idaho Falls found on momondo in the last 72 hours is $317.
The fastest flight from Seattle to Idaho Falls takes 1h 49m
Direct flights go from Seattle to Idaho Falls every day.
There is 1 airport in Idaho Falls. From Seattle there are direct flights to Idaho Falls Fanning Field (IDA).
Search flight deals

Frequently asked questions about flying from Seattle to Idaho Falls

  • How far is Seattle/Tacoma Intl to Idaho Falls Fanning Field by plane?

    There are 574.1 mi between Seattle/Tacoma Intl and Idaho Falls Fanning Field. Flights usually cover this in 1h 49m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Idaho Falls Fanning Field Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Idaho Falls Fanning Field Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Idaho Falls Fanning Field Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The travel and health documents you'll need for your trip to Idaho Falls Fanning Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Idaho Falls?

  • What is the most popular airline from Seattle to Idaho Falls?

Best airlines flying from Seattle to Idaho Falls

Compare and see reviews for airlines that fly from Seattle to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $177Free CancellationRating
7.9
12,794 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Idaho Falls

    Alaska Airlines flight deals from Seattle to Idaho Falls start from $177 round-trip. Over the 15 Alaska Airlines flights for this route in a normal week, average airfare is usually $326 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Idaho Falls?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Idaho Falls. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Idaho Falls with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Idaho Falls flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Idaho Falls?

Once all potential Seattle to Idaho Falls flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Idaho Falls right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Idaho Falls now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Idaho Falls and let you know when they change.

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