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Idaho Falls

$99+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IDA
Mar 4 — Mar 111
Wed 3/4
Wed 3/11
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 February 2, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/31. 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 6/263:09 pm
PDX
-
IDA
Nonstop1h 40m
Allegiant Air
Mon 6/296:39 pm
IDA
-
PDX
Nonstop1h 39m
Allegiant Air
Deal found 1/31$149
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/41:59 pm
SEA
-
IDA
Nonstop1h 44m
Alaska Airlines
Sat 3/75:20 pm
IDA
-
SEA
Nonstop2h 01m
Alaska Airlines
Deal found 2/1$157
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Mon 7/2712:20 pm
PDX
-
IDA
Nonstop1h 40m
Allegiant Air
Mon 8/33:50 pm
IDA
-
PDX
Nonstop1h 36m
Allegiant Air
Deal found 2/1$170
This Alaska Airlines deal was found by Cheapflights users on 1/31. 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.
Tue 5/198:00 pm
SEA
-
IDA
Nonstop1h 45m
Alaska Airlines
Wed 5/276:00 am
IDA
-
SEA
Nonstop1h 58m
Alaska Airlines
Deal found 1/31$197
This Expedia deal was found by Cheapflights users on 1/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/202:32 pm
SEA
-
IDA
Nonstop1h 47m
Alaska Airlines
Fri 3/275:59 pm
IDA
-
SEA
Nonstop2h 03m
Alaska Airlines
Deal found 1/31$207
This Alaska Airlines deal was found by Cheapflights users on 2/1. 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.
Thu 3/58:52 pm
SEA
-
IDA
Nonstop1h 44m
Alaska Airlines
Sun 3/88:00 am
IDA
-
SEA
Nonstop2h 07m
Alaska Airlines
Deal found 2/1$222
This Alaska Airlines deal was found by Cheapflights users on 1/31. 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 2/281:59 pm
SEA
-
IDA
Nonstop1h 44m
Alaska Airlines
Mon 3/25:20 pm
IDA
-
SEA
Nonstop2h 01m
Alaska Airlines
Deal found 1/31$237
This Alaska Airlines deal was found by Cheapflights users on 1/31. 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.
Thu 4/98:04 pm
SEA
-
IDA
Nonstop1h 48m
Alaska Airlines
Sun 4/126:00 am
IDA
-
SEA
Nonstop2h 05m
Alaska Airlines
Deal found 1/31$252
This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:30 am
SEA
-
IDA
1 stop4h 17m
Delta
Wed 5/276:54 pm
IDA
-
SEA
1 stop6h 18m
Delta
Deal found 2/1$257
This Orbitz deal was found by Cheapflights users on 2/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/78:00 pm
SEA
-
IDA
Nonstop1h 45m
Alaska Airlines
Sun 6/146:00 am
IDA
-
SEA
Nonstop1h 59m
Alaska Airlines
Deal found 2/1$282
This Kiwi.com deal was found by Cheapflights users on 1/31. 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 6/265:36 pm
PDX
-
IDA
1 stop5h 23m
Multiple Airlines
Mon 6/296:39 pm
IDA
-
PDX
Nonstop1h 39m
Multiple Airlines
Deal found 1/31$284
This Alaska Airlines deal was found by Cheapflights users on 1/31. 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 2/148:52 pm
SEA
-
IDA
Nonstop1h 44m
Alaska Airlines
Tue 2/178:00 am
IDA
-
SEA
Nonstop2h 07m
Alaska Airlines
Deal found 1/31$297

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 February 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$149
(Kiwi.com)

One-way from

$99
(Alaska Airlines)

Popular in

March

Cheapest in

February

Average price

$212

Good round-trip deal

$197 or less

Good one-way deal

$118 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. 3% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Washington to Idaho Falls Fanning Field.
Search Deals
Price to beat on a one-way 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 February 2, 2026.
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

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 7/27

12:20 pm-3:00 pm

Nonstop1h 40m

Idaho Falls Fanning Field

Mon 8/3

3:50 pm-4:26 pm

Nonstop1h 36m

$170

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Tue 5/19

8:00 pm-10:45 pm

Nonstop1h 45m

Idaho Falls Fanning Field

Wed 5/27

6:00 am-6:58 am

Nonstop1h 58m

$197

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Thu 3/5

8:52 pm-11:36 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Sun 3/8

8:00 am-9:07 am

Nonstop2h 07m

$222

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Sat 2/28

1:59 pm-4:43 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Mon 3/2

5:20 pm-6:21 pm

Nonstop2h 01m

$237

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Wed 4/29

12:43 pm-3:29 pm

Nonstop1h 46m

Idaho Falls Fanning Field

Sat 5/2

4:06 pm-5:00 pm

Nonstop1h 54m

$237

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Tue 5/19

5:30 am-10:47 am

1 stop4h 17m

Idaho Falls Fanning Field

Wed 5/27

6:54 pm-12:12 am

1 stop6h 18m

$257

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Thu 7/16

12:55 pm-3:40 pm

Nonstop1h 45m

Idaho Falls Fanning Field

Mon 7/20

6:00 am-6:59 am

Nonstop1h 59m

$297

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Sat 2/14

8:52 pm-11:36 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Tue 2/17

8:00 am-9:07 am

Nonstop2h 07m

$297

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 7/27

12:20 pm-3:00 pm

Nonstop1h 40m

Idaho Falls Fanning Field

Mon 8/3

6:00 am-10:06 am

1 stop5h 06m

$300

SpokaneIdaho Falls

GEG - IDA

GEGIDA

Spokane

Fri 5/8

9:55 am-3:29 pm

1 stop4h 34m

Idaho Falls Fanning Field

Sun 5/10

4:06 pm-6:59 pm

1 stop3h 53m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

Showing 1-10 of 47 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 $114). Flying from State of Washington to Idaho Falls in October is currently the most expensive (average of $227). 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 February 2, 2026.

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 in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 41% 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 February 2, 2026.

The most flights from USWA to IDA are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 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 40m. State of Washington and Idaho Falls are separated by a distance of 537 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 ($108), 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, Portland - Idaho Falls Fanning Field and Spokane - Idaho Falls Fanning Field.

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

    Consider Qatar Airways (85%), Hawaiian Airlines (81%) or SkyWest Airlines (74%) 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 $98. On average you can expect to pay $195. The most popular route, (Seattle/Tacoma Intl - Idaho Falls Fanning Field), can usually be booked for $247.

  • 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 $114). Flying from State of Washington to Idaho Falls in October is currently the most expensive (average of $227). 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

Traveling to a place near Idaho Falls?

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

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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 February 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$118Average$465FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$139Average$298FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$177Average$354FlexibilityNo cancel feeOn-time75%

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