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Cheap flights from Seattle to Idaho Falls from $100

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 2/19. 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
0 bags

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Find the cheapest flights from Seattle to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Hawaiian Airlines Logo
8:52 pm - 11:36 pmSEA-IDA
1h 44mnonstop
Hawaiian Airlines Logo
5:20 pm - 6:21 pmIDA-SEA
2h 01mnonstop
$177Hawaiian Airlines
Find Deal
Sat, Feb 28 - Wed, Mar 4
Alaska Airlines Logo
1:59 pm - 4:43 pmSEA-IDA
1h 44mnonstop
Alaska Airlines Logo
8:00 am - 9:07 amIDA-SEA
2h 07mnonstop
$187Alaska Airlines
Find Deal
Sat, Feb 28 - Wed, Mar 4
Alaska Airlines Logo
8:16 pm - 10:59 pmSEA-IDA
1h 43mnonstop
Alaska Airlines Logo
6:58 pm - 8:00 pmIDA-SEA
2h 02mnonstop
$197Alaska Airlines
Find Deal
Thu, Jan 22 - Mon, Jan 26
Alaska Airlines Logo
3:35 pm - 6:18 pmSEA-IDA
1h 43mnonstop
Alaska Airlines Logo
6:58 pm - 8:00 pmIDA-SEA
2h 02mnonstop
$218Alaska Airlines
Find Deal
Sat, Jan 17 - Tue, Jan 20
Delta Logo
4:55 pm - 10:57 pmSEA-IDA
5h 02m1 stop
Delta Logo
6:35 pm - 12:09 amIDA-SEA
6h 34m1 stop
$227Delta
Find Deal
Wed, Jan 21 - Sun, Jan 25
Alaska Airlines Logo
8:16 pm - 10:59 pmSEA-IDA
1h 43mnonstop
Alaska Airlines Logo
9:00 am - 10:10 amIDA-SEA
2h 10mnonstop
$228Alaska Airlines
Find Deal
Thu, Jan 22 - Sun, Jan 25
Alaska Airlines Logo
8:16 pm - 10:59 pmSEA-IDA
1h 43mnonstop
Alaska Airlines Logo
6:58 pm - 8:00 pmIDA-SEA
2h 02mnonstop
$237Alaska Airlines
Find Deal
Mon, Feb 2 - Fri, Feb 6
Alaska Airlines Logo
8:16 pm - 10:59 pmSEA-IDA
1h 43mnonstop
Alaska Airlines Logo
9:00 am - 10:10 amIDA-SEA
2h 10mnonstop
$268Alaska Airlines
Find Deal
Mon, Feb 2 - Fri, Feb 6
Alaska Airlines Logo
9:21 pm - 12:07 amSEA-IDA
1h 46mnonstop
Alaska Airlines Logo
6:58 pm - 8:00 pmIDA-SEA
2h 02mnonstop
$285Alaska Airlines
Find Deal
Mon, Jan 5 - Sat, Jan 10
Delta Logo
9:30 am - 10:21 pmSEA-IDA
11h 51m2 stops
Delta Logo
6:25 pm - 12:09 amIDA-SEA
6h 44m1 stop
$292Delta
Find Deal
Sat, Feb 28 - Wed, Mar 4

Delta flights from Seattle to Idaho Falls

Our best Delta deals on Seattle to Idaho Falls flight tickets
Delta
Jan 21
SEA4:55 pmSeattle/Tacoma Intl
5h 02m
1 stop
IDA10:57 pmIdaho Falls Fanning Field
Jan 25
IDA6:35 pmIdaho Falls Fanning Field
6h 34m
1 stop
SEA12:09 amSeattle/Tacoma Intl
$227
Find similar
Delta
Feb 28
SEA9:30 amSeattle/Tacoma Intl
11h 51m
2 stops
IDA10:21 pmIdaho Falls Fanning Field
Mar 4
IDA6:25 pmIdaho Falls Fanning Field
6h 44m
1 stop
SEA12:09 amSeattle/Tacoma Intl
$292
Find similar
Delta
Jan 22
SEA5:00 amSeattle/Tacoma Intl
6h 34m
1 stop
IDA12:34 pmIdaho Falls Fanning Field
Jan 25
IDA6:35 pmIdaho Falls Fanning Field
6h 34m
1 stop
SEA12:09 amSeattle/Tacoma Intl
$293
Find similar

Alaska Airlines flights from Seattle to Idaho Falls

Our best Alaska Airlines deals on Seattle to Idaho Falls flight tickets
Alaska Airlines
Feb 28
SEA1:59 pmSeattle/Tacoma Intl
1h 44m
IDA4:43 pmIdaho Falls Fanning Field
Mar 4
IDA8:00 amIdaho Falls Fanning Field
2h 07m
SEA9:07 amSeattle/Tacoma Intl
$187
Find similar
Alaska Airlines
Jan 22
SEA8:16 pmSeattle/Tacoma Intl
1h 43m
IDA10:59 pmIdaho Falls Fanning Field
Jan 26
IDA6:58 pmIdaho Falls Fanning Field
2h 02m
SEA8:00 pmSeattle/Tacoma Intl
$197
Find similar
Alaska Airlines
Jan 17
SEA3:35 pmSeattle/Tacoma Intl
1h 43m
IDA6:18 pmIdaho Falls Fanning Field
Jan 20
IDA6:58 pmIdaho Falls Fanning Field
2h 02m
SEA8:00 pmSeattle/Tacoma Intl
$218
Find similar

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 November 26, 2025.
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

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Sat 2/28

8:52 pm-11:36 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Wed 3/4

5:20 pm-6:21 pm

Nonstop2h 01m

$177

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Sat 2/28

1:59 pm-4:43 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Wed 3/4

8:00 am-9:07 am

Nonstop2h 07m

$187

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Thu 1/22

8:16 pm-10:59 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Mon 1/26

6:58 pm-8:00 pm

Nonstop2h 02m

$197

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Sat 1/17

3:35 pm-6:18 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Tue 1/20

6:58 pm-8:00 pm

Nonstop2h 02m

$218

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Wed 1/21

4:55 pm-10:57 pm

1 stop5h 02m

Idaho Falls Fanning Field

Sun 1/25

6:35 pm-12:09 am

1 stop6h 34m

$227

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Thu 1/22

8:16 pm-10:59 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Sun 1/25

9:00 am-10:10 am

Nonstop2h 10m

$228

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Mon 2/2

8:16 pm-10:59 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Fri 2/6

6:58 pm-8:00 pm

Nonstop2h 02m

$237

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Mon 2/2

8:16 pm-10:59 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Fri 2/6

9:00 am-10:10 am

Nonstop2h 10m

$268

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Mon 1/5

9:21 pm-12:07 am

Nonstop1h 46m

Idaho Falls Fanning Field

Sat 1/10

6:58 pm-8:00 pm

Nonstop2h 02m

$285

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Sat 2/28

9:30 am-10:21 pm

2 stops11h 51m

Idaho Falls Fanning Field

Wed 3/4

6:25 pm-12:09 am

1 stop6h 44m

$292

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 cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of February, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $238.

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

Our data shows that Tuesday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $298. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Sunday is $448.

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 at noon. Flights from Seattle to Idaho Falls during this time can be as low as $297. Try not to purchase tickets in the morning because they tend to be around $328. 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

How far in advance should I book a flight to Idaho Falls?

You are more likely to see cheaper flights to Idaho Falls from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho Falls for around $321 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho Falls from Seattle for as low as $176 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Idaho Falls Fanning Field flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Idaho Falls Fanning Field 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?

No. A direct flight is the cheapest option for a flight between Seattle to Idaho Falls.

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

As of November 2025, prices for Seattle to Idaho Falls flights are approximately 59% cheaper 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

$138

Fastest flight time

1h 44m

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 $138. The best round-trip flight deal from Seattle to Idaho Falls found on momondo in the last 72 hours is $177.
The fastest flight from Seattle to Idaho Falls takes 1h 44m
Direct flights go from Seattle to Idaho Falls every day.
There is 1 airport near Idaho Falls: Idaho Falls Fanning Field (IDA)
Search flight deals

  • 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 39m, 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
DeltaPriceFrom $118Free CancellationRating
7.9
7,998 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $149Free CancellationRating
7.8
2,814 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $177Free CancellationRating
8.0
11,354 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 12 Alaska Airlines flights for this route in a normal week, average airfare is usually $321 round-trip - but some users have found much cheaper deals with momondo.

  • Hawaiian Airlines Flights From Seattle to Idaho Falls

    Hawaiian Airlines is also a popular choice for this route. Hawaiian Airlines flight deals for Seattle to Idaho Falls start from as low as $149 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around $343. Hawaiian Airlines operates 12 flights to Idaho Falls from Seattle in an average week. Users have rated it 7.8/10 across 2,814 reviews.

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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