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Idaho Falls

$106+ Cheap flights from Washington to Idaho Falls (IDA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IDA
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheap 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 October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$106
(FlightHub)

Popular in

March

Cheapest in

May

Average price

$287

Good round-trip deal

$197 or less

Good one-way deal

$254 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Idaho Falls Fanning Field flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Idaho Falls Fanning Field flights.
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From Washington to Idaho Falls Fanning Field
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Washington to Idaho Falls Fanning Field.
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Price to beat on a one-way flight from Washington to Idaho Falls Fanning Field.
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Find 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 October 29, 2025.

This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:01 pmPDX - IDA
Nonstop1h 35mAllegiant Air
Mon 12/153:26 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Deal found 10/28$106
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/211:54 pmPDX - IDA
Nonstop1h 38mAllegiant Air
Mon 11/245:22 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Deal found 10/27$144
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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 12/49:15 pmSEA - IDA
Nonstop1h 44mAlaska Airlines
Mon 12/85:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Deal found 10/29$177
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Wed 12/105:49 pmPDX - IDA
1 stop5h 10mMultiple Airlines
Mon 12/153:26 pmIDA - PDX
Nonstop1h 45mMultiple Airlines
Deal found 10/28$202
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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 11/189:15 pmSEA - IDA
Nonstop1h 44mAlaska Airlines
Sun 11/236:00 amIDA - SEA
Nonstop2h 10mAlaska Airlines
Deal found 10/27$208
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Wed 12/105:49 pmPDX - IDA
1 stop5h 10mMultiple Airlines
Fri 12/123:26 pmIDA - PDX
Nonstop1h 45mMultiple Airlines
Deal found 10/28$209
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 12/125:49 pmPDX - IDA
1 stop5h 10mMultiple Airlines
Mon 12/153:26 pmIDA - PDX
Nonstop1h 45mMultiple Airlines
Deal found 10/27$210
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Sun 12/79:15 pmSEA - IDA
Nonstop1h 44mAlaska Airlines
Wed 12/105:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Deal found 10/29$217
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Tue 12/910:40 amPDX - IDA
1 stop4h 47mMultiple Airlines
Mon 12/153:26 pmIDA - PDX
Nonstop1h 45mMultiple Airlines
Deal found 10/28$219
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Sat 12/1310:40 amPDX - IDA
1 stop4h 47mMultiple Airlines
Mon 12/153:26 pmIDA - PDX
Nonstop1h 45mMultiple Airlines
Deal found 10/28$222
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Tue 12/910:40 amPDX - IDA
1 stop4h 47mMultiple Airlines
Fri 12/123:26 pmIDA - PDX
Nonstop1h 45mMultiple Airlines
Deal found 10/28$226
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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.
Fri 12/125:49 pmPDX - IDA
1 stop21h 38mAlaska Airlines
Mon 12/155:07 pmIDA - PDX
1 stop21h 43mAlaska Airlines
Deal found 10/27$234

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 October 29, 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

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 11/21

1:54 pm-4:32 pm

Nonstop1h 38m

Idaho Falls Fanning Field

Mon 11/24

5:22 pm-6:07 pm

Nonstop1h 45m

$144

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Thu 12/4

9:15 pm-11:59 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Mon 12/8

5:07 pm-6:16 pm

Nonstop2h 09m

$177

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Mon 3/2

7:55 pm-10:38 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Thu 3/5

8:00 am-8:59 am

Nonstop1h 59m

$217

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Mon 3/2

12:40 pm-3:23 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Thu 3/5

8:00 am-8:59 am

Nonstop1h 59m

$217

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Sat 12/13

10:40 am-4:27 pm

1 stop4h 47m

Idaho Falls Fanning Field

Mon 12/15

3:26 pm-4:11 pm

Nonstop1h 45m

$222

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Tue 2/17

4:55 pm-10:21 pm

1 stop4h 26m

Idaho Falls Fanning Field

Wed 2/25

6:45 pm-12:11 am

1 stop6h 26m

$238

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 11/21

1:54 pm-4:32 pm

Nonstop1h 38m

Idaho Falls Fanning Field

Mon 11/24

9:43 pm-9:21 am

1 stop12h 38m

$245

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 12/12

2:23 pm-10:21 pm

2 stops6h 58m

Idaho Falls Fanning Field

Sun 12/14

7:06 pm-3:33 pm

2 stops21h 27m

$246

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 12/12

2:23 pm-10:21 pm

2 stops6h 58m

Idaho Falls Fanning Field

Mon 12/15

1:17 pm-10:40 pm

2 stops10h 23m

$246

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Thu 12/18

9:21 pm-12:07 am

Nonstop1h 46m

Idaho Falls Fanning Field

Fri 12/26

6:00 am-7:20 am

Nonstop2h 20m

$248

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 55 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 June is currently the most expensive (average of $208). 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 October 29, 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.

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 38m. State of Washington and Idaho Falls are separated by a distance of 537 mi. Most flights are nonstop.

  • 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), Allegiant Air ($138), and Delta ($220).

  • 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 Alaska Airlines (90%), Horizon Air (90%) or Hawaiian Airlines (85%) 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 $108. On average you can expect to pay $311. The most popular route, (Seattle/Tacoma Intl - Idaho Falls Fanning Field), can usually be booked for $217.

  • 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 June is currently the most expensive (average of $208). 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
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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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$118Average$612FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$149Average$343FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$177Average$352FlexibilityNo cancel feeOn-time75%

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