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Cheap flights from Washington to Idaho Falls from $134

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Idaho Falls departing on 10/14. 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 Washington to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
10:30 am - 1:24 pmPDX  Portland-IDA Idaho Falls Fanning Field
1h 54mnonstop
Alaska Airlines Logo
3:57 pm - 4:50 pmIDA  Idaho Falls Fanning Field-PDX Portland
1h 53mnonstop
$237Alaska Airlines
Sat, Sep 12 - Sat, Sep 19
Alaska Airlines Logo
10:30 am - 1:21 pmPDX  Portland-IDA Idaho Falls Fanning Field
1h 51mnonstop
Alaska Airlines Logo
3:55 pm - 4:48 pmIDA  Idaho Falls Fanning Field-PDX Portland
1h 53mnonstop
$237Alaska Airlines
Sat, Oct 31 - Wed, Nov 4
Alaska Airlines Logo
10:30 am - 1:21 pmPDX  Portland-IDA Idaho Falls Fanning Field
1h 51mnonstop
Alaska Airlines Logo
3:54 pm - 4:47 pmIDA  Idaho Falls Fanning Field-PDX Portland
1h 53mnonstop
$237Alaska Airlines
Sat, Oct 31 - Wed, Nov 4
Alaska Airlines Logo
10:30 am - 1:24 pmPDX  Portland-IDA Idaho Falls Fanning Field
1h 54mnonstop
Alaska Airlines Logo
3:57 pm - 4:50 pmIDA  Idaho Falls Fanning Field-PDX Portland
1h 53mnonstop
$237Alaska Airlines
Sat, Sep 26 - Wed, Sep 30
Delta Logo
5:10 pm - 10:22 pmPDX  Portland-IDA Idaho Falls Fanning Field
4h 12m1 stop Salt Lake City
Delta Logo
6:00 am - 8:41 amIDA  Idaho Falls Fanning Field-PDX Portland
3h 41m1 stop Salt Lake City
$247Delta
Tue, Sep 22 - Sat, Sep 26
Delta Logo
5:35 am - 12:22 pmPDX  Portland-IDA Idaho Falls Fanning Field
5h 47m1 stop Salt Lake City
Delta Logo
6:00 am - 8:50 amIDA  Idaho Falls Fanning Field-PDX Portland
3h 50m1 stop Salt Lake City
$267Delta
Thu, Oct 22 - Mon, Oct 26
Delta Logo
7:00 am - 6:17 pmPDX  Portland-IDA Idaho Falls Fanning Field
10h 17m2 stops Seattle/Tacoma Intl Salt Lake City
Delta Logo
6:00 am - 8:50 amIDA  Idaho Falls Fanning Field-PDX Portland
3h 50m1 stop Salt Lake City
$272Delta
Fri, Oct 2 - Fri, Oct 9
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
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 Los Angeles
$310Multiple Airlines
Thu, Sep 17 - Mon, Sep 21
Multiple Airlines Logo
11:02 am - 11:58 amPDX  Portland-IDA Idaho Falls Fanning Field
23h 56m2 stops Los Angeles Los Angeles Las Vegas Harry Reid Intl
Multiple Airlines Logo
10:49 pm - 11:36 amIDA  Idaho Falls Fanning Field-PDX Portland
13h 47m1 stop Las Vegas Harry Reid Intl
$337Multiple Airlines
Thu, Sep 24 - Fri, Oct 2

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Alaska Airlines flights from State of Washington to Idaho Falls

Our best Alaska Airlines deals on State of Washington to Idaho Falls flight tickets
Alaska Airlines
Sep 26
PDX10:30 amPortland
1h 54m
IDA1:24 pmIdaho Falls Fanning Field
Sep 30
IDA3:57 pmIdaho Falls Fanning Field
1h 53m
PDX4:50 pmPortland
$237
Alaska Airlines
Sep 24
PDX10:30 amPortland
1h 54m
IDA1:24 pmIdaho Falls Fanning Field
Sep 30
IDA3:57 pmIdaho Falls Fanning Field
1h 53m
PDX4:50 pmPortland
$247
Alaska Airlines
Sep 22
PDX5:41 pmPortland
4h 15m
1 stop
IDA10:56 pmIdaho Falls Fanning Field
Sep 30
IDA3:57 pmIdaho Falls Fanning Field
1h 53m
PDX4:50 pmPortland
$257

Delta flights from State of Washington to Idaho Falls

Our best Delta deals on State of Washington to Idaho Falls flight tickets
Delta
Oct 2
PDX7:00 amPortland
10h 17m
2 stops
IDA6:17 pmIdaho Falls Fanning Field
Oct 9
IDA6:00 amIdaho Falls Fanning Field
3h 50m
1 stop
PDX8:50 amPortland
$272
Delta
Sep 12
PDX5:10 pmPortland
4h 12m
1 stop
IDA10:22 pmIdaho Falls Fanning Field
Sep 19
IDA6:00 amIdaho Falls Fanning Field
3h 41m
1 stop
PDX8:41 amPortland
$298
Delta
Sep 24
PDX5:10 pmPortland
4h 12m
1 stop
IDA10:22 pmIdaho Falls Fanning Field
Sep 29
IDA6:57 pmIdaho Falls Fanning Field
5h 43m
1 stop
PDX11:40 pmPortland
$308

momondo Fare Finder

 
Customize your flight search to find flights from State of 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, momondo users made 832,500 searches. Data last updated August 12, 2026.
Use the filters below to find and compare flights from Washington to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandIdaho Falls

PDX Portland - IDA Idaho Falls Fanning Field

PDXIDA

Portland

Sat 9/12

10:30 am-1:24 pm

Nonstop1h 54m

Idaho Falls Fanning Field

Sat 9/19

3:57 pm-4:50 pm

Nonstop1h 53m

$237
Quickest round-trip

PortlandIdaho Falls

PDX Portland - IDA Idaho Falls Fanning Field

PDXIDA

Portland

Sat 10/31

10:30 am-1:21 pm

Nonstop1h 51m

Idaho Falls Fanning Field

Wed 11/4

3:55 pm-4:48 pm

Nonstop1h 53m

$237

PortlandIdaho Falls

PDX Portland - IDA Idaho Falls Fanning Field

PDXIDA

Portland

Sat 10/31

10:30 am-1:21 pm

Nonstop1h 51m

Idaho Falls Fanning Field

Wed 11/4

3:54 pm-4:47 pm

Nonstop1h 53m

$237

PortlandIdaho Falls

PDX Portland - IDA Idaho Falls Fanning Field

PDXIDA

Portland

Sat 9/26

10:30 am-1:24 pm

Nonstop1h 54m

Idaho Falls Fanning Field

Wed 9/30

3:57 pm-4:50 pm

Nonstop1h 53m

$237

PortlandIdaho Falls

PDX Portland - IDA Idaho Falls Fanning Field

PDXIDA

Portland

Tue 9/22

5:10 pm-10:22 pm

1 stop4h 12m

Idaho Falls Fanning Field

Sat 9/26

6:00 am-8:41 am

1 stop3h 41m

$247

PortlandIdaho Falls

PDX Portland - IDA Idaho Falls Fanning Field

PDXIDA

Portland

Thu 10/22

5:35 am-12:22 pm

1 stop5h 47m

Idaho Falls Fanning Field

Mon 10/26

6:00 am-8:50 am

1 stop3h 50m

$267

PortlandIdaho Falls

PDX Portland - IDA Idaho Falls Fanning Field

PDXIDA

Portland

Fri 10/2

7:00 am-6:17 pm

2 stops10h 17m

Idaho Falls Fanning Field

Fri 10/9

6:00 am-8:50 am

1 stop3h 50m

$272

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

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

PortlandIdaho Falls

PDX Portland - IDA Idaho Falls Fanning Field

PDXIDA

Portland

Thu 9/24

11:02 am-11:58 am

2 stops23h 56m

Idaho Falls Fanning Field

Fri 10/2

10:49 pm-11:36 am

1 stop13h 47m

$337

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 State of Washington 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 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 State of Washington 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 Washington to Idaho Falls Fanning Field flight route?

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

What cabin class options are available on State of Washington to Idaho Falls flights?

There are 4 cabin classes available to choose from on State of Washington 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 State of Washington to Idaho Falls flights?

You could potentially save up to 46% on your flight if you consider stops on a State of Washington to Idaho Falls flight.

Cheap State of Washington to Idaho Falls flight deals and tips

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

Best Price Found

$639

Fastest flight time

1h 40m

Direct flights

Every day

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from State of Washington in the past 72 hours is $639. The best round-trip flight deal from State of Washington to Idaho Falls found on momondo in the last 72 hours is $317.
The fastest flight from State of Washington to Idaho Falls takes 1h 40m
Direct flights go from State of Washington to Idaho Falls every day.
There is 1 airport in Idaho Falls. From State of Washington there are direct flights to Idaho Falls Fanning Field (IDA).
Search flight deals

Frequently asked questions about flying from Washington to Idaho Falls

  • When did momondo last update prices for flights from Washington to Idaho Falls Fanning Field Airport?

    Prices for flights from Washington to Idaho Falls Fanning Field Airport are updated daily.

  • How many operators does momondo search for flights from Washington to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from Washington to Idaho Falls Fanning Field Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington 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 State of Washington to Idaho Falls?

Best airlines flying from State of Washington to Idaho Falls

Compare and see reviews for airlines that fly from State of Washington to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $177Free CancellationRating
7.9
12,800 reviews
Search Alaska Airlines flights

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 Washington to Idaho Falls?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington to Idaho Falls for you.

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

All flight searches from Washington to Idaho Falls on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Washington and Idaho Falls by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Idaho Falls, momondo offers a useful price alert feature which will track prices for flights to Idaho Falls from Washington and alert you when they change.

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