$174 Find Cheap Flights from Portland to Idaho

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Idaho departing on 9/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Idaho, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Idaho, as well as popular online travel agencies
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Cheap Flights from Portland to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boise1 stop$352
Idaho Falls
Idaho Falls1 stop$608
Spokane
Spokane2 stops$430
Boise
Boise1 stop$352
Idaho Falls
Idaho Falls1 stop$608
Spokane
Spokane2 stops$430

Book Cheap Portland to Idaho Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Idaho that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Idaho

Wed, Sep 16 - Sat, Sep 19
United Airlines Logo
6:00 am - 11:26 am
PWM
-
BOI
7h 26m
1 stop
United Airlines Logo
7:05 pm - 9:08 am
BOI
-
PWM
12h 03m
2 stops
$352United Airlines
Wed, Sep 9 - Wed, Sep 23
United Airlines Logo
6:00 am - 11:26 am
PWM
-
BOI
7h 26m
1 stop
United Airlines Logo
12:28 pm - 9:23 pm
BOI
-
PWM
6h 55m
1 stop
$355United Airlines
Wed, Sep 9 - Sat, Sep 26
Delta Logo
1:59 pm - 11:59 pm
PWM
-
BOI
12h 00m
2 stops
Delta Logo
11:03 am - 11:56 pm
BOI
-
PWM
10h 53m
2 stops
$357Delta
Wed, Sep 9 - Wed, Sep 23
United Airlines Logo
6:00 am - 3:31 pm
PWM
-
BOI
11h 31m
2 stops
United Airlines Logo
12:28 pm - 9:23 pm
BOI
-
PWM
6h 55m
1 stop
$360United Airlines
Thu, Sep 10 - Sat, Sep 26
Delta Logo
6:00 am - 1:01 pm
PWM
-
BOI
9h 01m
1 stop
Delta Logo
11:03 am - 11:56 pm
BOI
-
PWM
10h 53m
2 stops
$398Delta
Thu, Sep 10 - Sat, Sep 26
Delta Logo
4:45 pm - 11:59 pm
PWM
-
BOI
9h 14m
2 stops
Delta Logo
11:03 am - 11:56 pm
BOI
-
PWM
10h 53m
2 stops
$403Delta
Sat, Aug 22 - Sat, Aug 29
Southwest Logo
5:40 am - 3:30 pm
PWM
-
BOI
11h 50m
2 stops
Southwest Logo
6:10 am - 9:00 pm
BOI
-
PWM
12h 50m
2 stops
$404Southwest
Wed, Sep 9 - Fri, Sep 25
Delta Logo
4:45 pm - 11:59 pm
PWM
-
BOI
9h 14m
2 stops
Delta Logo
11:10 pm - 11:56 pm
BOI
-
PWM
22h 46m
2 stops
$407Delta
Wed, Sep 30 - Tue, Oct 6
American Airlines Logo
6:30 am - 2:31 pm
PWM
-
BOI
10h 01m
1 stop
American Airlines Logo
6:44 am - 11:24 pm
BOI
-
PWM
14h 40m
2 stops
$408American Airlines
Wed, Sep 30 - Tue, Oct 6
American Airlines Logo
5:30 am - 5:03 pm
PWM
-
BOI
13h 33m
2 stops
American Airlines Logo
6:44 am - 11:24 pm
BOI
-
PWM
14h 40m
2 stops
$419American Airlines
Booking Insights

KAYAK's insights & trends for Portland to Idaho flights

Get data-powered insights and trends into flights from Portland to Idaho to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Portland to Idaho?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Idaho, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Idaho is February, when tickets cost $0 (return) on average. On the other hand, the most expensive months are March and June, when the average cost of round-trip tickets is $535 and $451 respectively.

Good to know

Low seasonDecember
Cheapest flight$174
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Portland to Boise

FAQs - booking Idaho flights

  • How does KAYAK find such low prices on flights from Portland to Idaho?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Idaho.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Idaho?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Portland to Idaho is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Idaho?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Portland to Idaho with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Idaho?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Portland to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Portland to Idaho

 
See real verified KAYAK customer reviews for airlines flying from Portland to Idaho. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Idaho? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9899 reviews
7.7Boarding
7.3Comfort
6.6Food
8.1Crew
7.1Entertainment
Airline reviews

Great staff. Clean plane, but we were delayed for more than an hour due to maintenance issues and had to board another plane.

8.0 ExcellentNico, Jun 2026
LAX - HNL
Read more United Airlines reviews

Great staff. Clean plane, but we were delayed for more than an hour due to maintenance issues and had to board another plane.

I was exhausted from a long day. The flight was smooth. The first flight during my 3 week travel that took off on time.

1 flight cancelled Had to fly out of different city Flight at new departure city was delayed 3 hours causing us to miss connecting flights. By the time we did make it to Prague our luggage did not. Had to wait day and a half for luggage to be delivered. Customer service was not good. Agents did not arrive at gate until 5-10 minutes before boarding

Awful. Delayed flights, missed connection to Toronto. Hotel vouchers were for already booked hotels x3. Giant waste of my time

Horrible I am at almost 2,000,000 miles on United. This was probably the worst flight ever. An hour and a half before takeoff I get a message that they’re changing the plane and I no longer have a seat in Polaris business Supposedly, there was a problem with the plane, but then there was no other plane Finally, they decided to bring a plane from Newark to Washington Dulles Of course the original flight was at 10:45 PM so by the time the plane got there it was 12:30 AM. It had not been cleaned. It had not been catered. They don’t really have people available to do those things when it’s not pre-programmed at 1 o’clock in the morning. The crew had to be changed And the new plane held 28 fewer people than the scheduled plane There is no way you can hate United Airlines enough The people at the gate were actually just fine, but it was management who was completely useless And did they send extra help to the people at the gate? Did they send supervisors? Of course not. Just don’t take United find somebody else or buy a boat

Great experience. Boarding was fast, staff were very nice and funny, everything at the seat worked well.

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

Both my flight where delayed Had 25min to make it to my transfer flight

I just got back from a trip with 3 flights each way. The flights were good and we were happy with out experience. There was one steward on our first flight that was harsh and grump with passengers. It did not leave a good impression. All of the other flight crews were great on the other five flights.

They changed my flight 5 hours before it took off and changed my connecting airport messing up my entire 1st day in Japan.

I cancelled this flight 2 days before departure but I followed your texts and emails and IF you were correct this flight turned into a nightmare.

My flight was delayed twice. The first time because of “plane maintenance” and the second because the previous flight who supposedly “arrived early” took an obnoxiously long time to get off the plane. Total delay was over an hour for no reason. Not to mention your airline repeatedly changed our gate from one end of the terminal to the other. Not very happy about this experience. My previous flights with American haven’t had this many issues.

Very turbulent flight, no drinks, very little service, unorganized boarding, gate changed multiple times

We’ve had a year of delays with American, and this one was another flight to add to that list. It just reduced our vacation by a day! So frustrating. In-flight entertainment (TVs) weren’t working, There was no drinks service due to delivery issues.

Flight delays for communication overall not a good experience uncomfortable on the plane. Person in front of me reclined his seat, putting them inches from my lap.

the plane was so hot!! the air-conditioning was barely blowing. The flight was delayed, and we had to sit on the hot plane before take off for an extended amount of time, waiting on international passengers. Would not have been so bad if it was not so hot. They said it would get better after take off, but it did not.

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

Flight was delayed after boarding and no idea when it would take off. Crew in Portland did arrange for transport to Boston for a different set of flights to my destination.

Seats are so close together. Middle seats should be discounted.

I just for my TSA. So security line is short and upgraded to one group up. I do think the ground crew should learn new way of boarding - the passengers sitting in higher number seat should board first to prevent traffic jam.

Everything you need to know for your flight from Portland to Idaho

Information on your arrival and departure airports