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Idaho Falls

$94+ Cheap flights from Washington to Idaho Falls (IDA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IDA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Washington to Idaho Falls

Cheapest flights from Washington to Idaho Falls
Explore the most affordable flight options available from Washington to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Mytrip deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:01 amPDX - IDA
Nonstop1h 35mAllegiant Air
Mon 12/291:26 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Deal found 12/10$184
This Kiwi.com deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:01 amPDX - IDA
Nonstop1h 35mMultiple Airlines
Fri 1/306:58 pmIDA - PDX
1 stop4h 48mMultiple Airlines
Deal found 12/9$209
This Kiwi.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:51 pmGEG - IDA
1 stop17h 29mMultiple Airlines
Tue 1/66:44 pmIDA - GEG
2 stops42h 40mMultiple Airlines
Deal found 12/10$312
This Kiwi.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:01 amPDX - IDA
Nonstop1h 35mMultiple Airlines
Mon 12/2910:52 pmIDA - PDX
1 stop15h 32mMultiple Airlines
Deal found 12/10$327
This Kiwi.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:51 pmGEG - IDA
1 stop17h 29mAllegiant Air
Sun 1/46:21 pmIDA - GEG
1 stop16h 26mAllegiant Air
Deal found 12/10$361
This Alaska Airlines deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:21 pmSEA - IDA
Nonstop1h 46mAlaska Airlines
Wed 12/316:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Deal found 12/9$368
This Alaska Airlines deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:00 amGEG - IDA
1 stop16h 07mAlaska Airlines
Mon 1/56:00 amIDA - GEG
1 stop19h 32mAlaska Airlines
Deal found 12/10$384
This Kiwi.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:51 pmGEG - IDA
1 stop17h 29mAllegiant Air
Thu 1/15:30 pmIDA - GEG
1 stop17h 17mAllegiant Air
Deal found 12/10$390
This Kiwi.com deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:01 amPDX - IDA
Nonstop1h 35mMultiple Airlines
Tue 12/306:00 amIDA - PDX
1 stop5h 53mMultiple Airlines
Deal found 12/9$406
This Kiwi.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:51 pmGEG - IDA
1 stop17h 29mMultiple Airlines
Fri 1/21:26 pmIDA - GEG
2 stops46h 41mMultiple Airlines
Deal found 12/10$417
This WAYA deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:20 amSEA - IDA
1 stop6h 16mMultiple Airlines
Thu 1/16:00 amIDA - SEA
Nonstop2h 20mMultiple Airlines
Deal found 12/11$417
This Alaska Airlines deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/279:21 pmSEA - IDA
Nonstop1h 46mAlaska Airlines
Sat 1/36:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Deal found 12/9$418

Find flight deals from Washington to Idaho Falls

Keep the following information in mind while searching for Washington to Idaho Falls flight deals. Data was last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$177
(Alaska Airlines)

One-way from

$94
(Delta)

Popular in

March

Cheapest in

January

Average price

$338

Good round-trip deal

$297 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Idaho Falls Fanning Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Idaho Falls Fanning Field flights.
Search Deals
From Washington to Idaho Falls Fanning Field
Search Deals
One-way flight from Washington to Idaho Falls Fanning Field
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Washington to Idaho Falls Fanning Field.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Washington to Idaho Falls that are best for you.

Fly from

Washington

Fly to

Idaho Falls

Route

Depart

Return

Price

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Wed 1/21

5:30 am-12:34 pm

1 stop6h 04m

Idaho Falls Fanning Field

Sun 1/25

6:35 pm-12:09 am

1 stop6h 34m

$197

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Fri 2/6

3:35 pm-6:18 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Mon 2/9

6:58 pm-8:00 pm

Nonstop2h 02m

$197

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Thu 1/22

3:35 pm-6:18 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Sun 1/25

6:58 pm-8:00 pm

Nonstop2h 02m

$197

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 12/26

10:01 am-12:36 pm

Nonstop1h 35m

Idaho Falls Fanning Field

Fri 1/30

6:58 pm-10:46 pm

1 stop4h 48m

$209

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Wed 1/21

3:35 pm-6:18 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Sun 1/25

9:00 am-10:10 am

Nonstop2h 10m

$218

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Wed 1/14

5:25 am-12:34 pm

1 stop6h 09m

Idaho Falls Fanning Field

Fri 1/23

1:15 pm-4:55 pm

1 stop4h 40m

$252

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 5/15

11:50 am-2:27 pm

Nonstop1h 37m

Idaho Falls Fanning Field

Tue 5/19

4:00 pm-4:41 pm

Nonstop1h 41m

$257

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Wed 2/4

1:38 pm-10:59 pm

1 stop8h 21m

Idaho Falls Fanning Field

Sat 2/7

6:58 pm-9:29 am

1 stop15h 31m

$264

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 1/23

9:30 pm-6:18 pm

1 stop19h 48m

Idaho Falls Fanning Field

Tue 1/27

6:58 pm-10:46 pm

1 stop4h 48m

$264

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

$268

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 50 results
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Best time to book a flight from Washington to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Idaho Falls

What is the cheapest month to book a flight from State of Washington to Idaho Falls?

Currently, May is the cheapest month in which you can book a flight from State of Washington to Idaho Falls (average of $111). Flying from State of Washington to Idaho Falls in October is currently the most expensive (average of $218). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WA to IDA?

Find hourly flight availability from Washington to Idaho Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

One of the essential ways to save on airfare from State of Washington to Idaho Falls is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 22% on airfare.

Weekly flight availability from State of Washington to Idaho Falls

Explore weekly flight availability from Washington to Idaho Falls. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 12, 2025.

The most flights from USWA to IDA are scheduled on a Wednesday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Related info for your journey

Find useful and relevant information for your journey from Washington to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Idaho Falls from Washington?

    Most people fly into Idaho Falls Fanning Field (IDA) if they book a flight to Idaho Falls from Washington. Fanning Field is conveniently located just 3.8 mi from Idaho Falls’s city center.

  • How popular is this State of Washington to Idaho Falls flight route?

    The Washington to Idaho Falls Fanning Field flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from State of Washington to Idaho Falls?

    Departing from State of Washington to Idaho Falls will take you 1h 43m. State of Washington and Idaho Falls are separated by a distance of 565 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from State of Washington to Idaho Falls one-way?

    The cheapest airlines for a one-way flight from State of Washington to Idaho Falls are Alaska Airlines ($98), Hawaiian Airlines ($118), and Delta ($162).

  • What are the most popular routes from State of Washington to Idaho Falls?

    The most popular flight routes from State of Washington to Idaho Falls are Seattle/Tacoma Intl - Idaho Falls Fanning Field, Spokane - Idaho Falls Fanning Field and Portland - Idaho Falls Fanning Field.

  • What are the most reliable airlines from State of Washington to Idaho Falls?

    Consider Horizon Air (86%), Alaska Airlines (85%) or SkyWest Airlines (84%) when booking your flight. These represent the most reliable airlines when flying from State of Washington to Idaho Falls.

  • What are the cheapest flights from State of Washington to Idaho Falls?

    The cheapest flight price from State of Washington to Idaho Falls is $177. On average you can expect to pay $374. The most popular route, (Seattle/Tacoma Intl - Idaho Falls Fanning Field), can usually be booked for $207.

  • Can I find deals for flights from Washington to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on Washington to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Idaho Falls.

  • Can I find deals for business class flights from Washington to Idaho Falls?

    Yes. Cheapflights offers flight deals from Washington to Idaho Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Idaho Falls?

    Currently, May is the cheapest month in which you can book a flight from State of Washington to Idaho Falls (average of $111). Flying from State of Washington to Idaho Falls in October is currently the most expensive (average of $218). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Washington to Idaho Falls

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Top 3 airlines flying from Washington to Idaho Falls

Discover the top 3 airlines that operate flights from Washington to Idaho Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$118Average$557FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$149Average$343FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$177Average$354FlexibilityNo cancel feeOn-time75%

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