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Cheap flights from Washington to Idaho Falls from $94

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 2/10. 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 Washington to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
8:16 pm - 10:59 pm
SEA
-
IDA
1h 43mnonstop
Alaska Airlines Logo
6:58 pm - 8:00 pm
IDA
-
SEA
2h 02mnonstop
$176Alaska Airlines
Sat, Jan 17 - Wed, Jan 21
Alaska Airlines Logo
8:16 pm - 10:59 pm
SEA
-
IDA
1h 43mnonstop
Alaska Airlines Logo
9:00 am - 10:10 am
IDA
-
SEA
2h 10mnonstop
$186Alaska Airlines
Fri, Jan 16 - Wed, Jan 21
Alaska Airlines Logo
3:35 pm - 6:18 pm
SEA
-
IDA
1h 43mnonstop
Alaska Airlines Logo
6:58 pm - 8:00 pm
IDA
-
SEA
2h 02mnonstop
$187Alaska Airlines
Sat, Jan 17 - Fri, Jan 23
Alaska Airlines Logo
8:16 pm - 10:59 pm
SEA
-
IDA
1h 43mnonstop
Alaska Airlines Logo
6:58 pm - 8:00 pm
IDA
-
SEA
2h 02mnonstop
$196Alaska Airlines
Fri, Jan 16 - Fri, Jan 23
Alaska Airlines Logo
8:16 pm - 10:59 pm
SEA
-
IDA
1h 43mnonstop
Alaska Airlines Logo
9:00 am - 10:10 am
IDA
-
SEA
2h 10mnonstop
$197Alaska Airlines
Fri, Jan 16 - Thu, Jan 22
Alaska Airlines Logo
8:16 pm - 10:59 pm
SEA
-
IDA
1h 43mnonstop
Alaska Airlines Logo
9:00 am - 10:10 am
IDA
-
SEA
2h 10mnonstop
$227Alaska Airlines
Sun, Jan 18 - Wed, Jan 21
Delta Logo
10:00 am - 5:51 pm
PDX
-
IDA
6h 51m1 stop
Delta Logo
6:35 pm - 11:55 pm
IDA
-
PDX
6h 20m1 stop
$228Delta
Wed, Jan 28 - Sun, Feb 1
Delta Logo
7:10 am - 5:51 pm
PDX
-
IDA
9h 41m2 stops
Delta Logo
6:35 pm - 10:54 pm
IDA
-
PDX
5h 19m1 stop
$241Delta
Mon, Jan 12 - Fri, Jan 16
Allegiant Air Logo
8:58 pm - 2:19 pm
GEG
-
IDA
16h 21m1 stop
Allegiant Air Logo
1:34 pm - 9:58 am
IDA
-
GEG
21h 24m1 stop
$334Allegiant Air
Thu, Jan 8 - Thu, Jan 15
Multiple Airlines Logo
8:58 pm - 8:30 pm
GEG
-
IDA
22h 32m2 stops
Multiple Airlines Logo
1:34 pm - 9:58 am
IDA
-
GEG
21h 24m1 stop
$380Multiple Airlines
Thu, Jan 8 - Thu, Jan 15

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
Jan 17
SEA8:16 pmSeattle/Tacoma Intl
1h 43m
IDA10:59 pmIdaho Falls Fanning Field
Jan 21
IDA6:58 pmIdaho Falls Fanning Field
2h 02m
SEA8:00 pmSeattle/Tacoma Intl
$176
Find similar
Alaska Airlines
Jan 16
SEA8:16 pmSeattle/Tacoma Intl
1h 43m
IDA10:59 pmIdaho Falls Fanning Field
Jan 21
IDA9:00 amIdaho Falls Fanning Field
2h 10m
SEA10:10 amSeattle/Tacoma Intl
$186
Find similar
Alaska Airlines
Jan 17
SEA3:35 pmSeattle/Tacoma Intl
1h 43m
IDA6:18 pmIdaho Falls Fanning Field
Jan 23
IDA6:58 pmIdaho Falls Fanning Field
2h 02m
SEA8:00 pmSeattle/Tacoma Intl
$187
Find similar

Delta flights from State of Washington to Idaho Falls

Our best Delta deals on State of Washington to Idaho Falls flight tickets
Delta
Jan 28
PDX10:00 amPortland
6h 51m
1 stop
IDA5:51 pmIdaho Falls Fanning Field
Feb 1
IDA6:35 pmIdaho Falls Fanning Field
6h 20m
1 stop
PDX11:55 pmPortland
$228
Find similar
Delta
Jan 12
PDX7:10 amPortland
9h 41m
2 stops
IDA5:51 pmIdaho Falls Fanning Field
Jan 16
IDA6:35 pmIdaho Falls Fanning Field
5h 19m
1 stop
PDX10:54 pmPortland
$241
Find similar
Delta
Feb 2
SEA4:55 pmSeattle/Tacoma Intl
5h 02m
1 stop
IDA10:57 pmIdaho Falls Fanning Field
Feb 6
IDA6:35 pmIdaho Falls Fanning Field
6h 34m
1 stop
SEA12:09 amSeattle/Tacoma Intl
$258
Find similar

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 December 23, 2025.
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

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Sat 1/17

8:16 pm-10:59 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Wed 1/21

6:58 pm-8:00 pm

Nonstop2h 02m

$176

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Fri 1/16

8:16 pm-10:59 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Wed 1/21

9:00 am-10:10 am

Nonstop2h 10m

$186

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Sat 1/17

3:35 pm-6:18 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Fri 1/23

6:58 pm-8:00 pm

Nonstop2h 02m

$187

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Fri 1/16

8:16 pm-10:59 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Fri 1/23

6:58 pm-8:00 pm

Nonstop2h 02m

$196

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Fri 1/16

8:16 pm-10:59 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Thu 1/22

9:00 am-10:10 am

Nonstop2h 10m

$197

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Sun 1/18

8:16 pm-10:59 pm

Nonstop1h 43m

Idaho Falls Fanning Field

Wed 1/21

9:00 am-10:10 am

Nonstop2h 10m

$227

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Wed 1/28

10:00 am-5:51 pm

1 stop6h 51m

Idaho Falls Fanning Field

Sun 2/1

6:35 pm-11:55 pm

1 stop6h 20m

$228

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 1/12

7:10 am-5:51 pm

2 stops9h 41m

Idaho Falls Fanning Field

Fri 1/16

6:35 pm-10:54 pm

1 stop5h 19m

$241

SpokaneIdaho Falls

GEG - IDA

GEGIDA

Spokane

Thu 1/8

8:58 pm-2:19 pm

1 stop16h 21m

Idaho Falls Fanning Field

Thu 1/15

1:34 pm-9:58 am

1 stop21h 24m

$334

SpokaneIdaho Falls

GEG - IDA

GEGIDA

Spokane

Thu 1/8

8:58 pm-8:30 pm

2 stops22h 32m

Idaho Falls Fanning Field

Thu 1/15

1:34 pm-9:58 am

1 stop21h 24m

$380

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 Wednesday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $287. 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 State of Washington 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 $327. 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

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

You are more likely to see cheaper flights to Idaho Falls from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho Falls for around $319 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho Falls from State of Washington for as low as $178 on momondo.

What cabin class options are available on Washington to Idaho Falls Fanning Field flights?

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

You could potentially save up to 3% 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

$153

Fastest flight time

1h 43m

Direct flights

Mon, Tue, Wed, Thu, Sat and Sun

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from State of Washington in the past 72 hours is $153. The best round-trip flight deal from State of Washington to Idaho Falls found on momondo in the last 72 hours is $197.
The fastest flight from State of Washington to Idaho Falls takes 1h 43m
Direct flights go from State of Washington to Idaho Falls on Monday, Tuesday, Wednesday, Thursday, Saturday and Sunday. The only airline offering direct flights is Alaska Airlines.
There is 1 airport in Idaho Falls. From State of Washington there are direct flights to Idaho Falls Fanning Field (IDA).
Search flight deals

  • 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
DeltaPriceFrom $118Free CancellationRating
7.9
8,015 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $149Free CancellationRating
7.8
2,820 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $177Free CancellationRating
8.0
11,517 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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