$28 Find Cheap Flights from Idaho to the United States

1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to the United States

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Useful Info

Good to know

Low seasonSeptember
Cheapest flight$28
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from Boise to Denver

Flights from Idaho to the United States: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Idaho to the United States 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with Alaska Airlines
BOI
-
SAN
Jan 2026
Since I flew First Class I really have no advice! Everything was perfect! The ticketing agents were fantastic, flew through TSA Precheck, great announcements at the gate, quick boarding. My only suggestion is to check First Class prices before committing to the very expensive baggage fees and choosing a seat fee!!!
Verified travelerFlew with Hawaiian Airlines
IDA
-
SEA
Jun 2025
Idaho Falls is not a large airport, so it was easy to find my way around. Take a meal if you want more than a snack.
AllieFlew with Alaska Airlines
BOI
-
PDX
May 2025
It is a ten minute walk from tarmac to baggage claim. If you have mobility issues, it is best to ask for a wheelchair. I did not receive a message on my phone regarding which carousel by bags would be loaded on and there was NOT a centralized notification board to inform you of the carousel
LisaFlew with Alaska Airlines
BOI
-
BUR
Jul 2024
If they ask you to check your bag at the gate because the flight is full, you get to board sooner even if you don't check ALL of your bags.

FAQs for booking flights from Idaho to the United States

  • How does KAYAK find such low prices on flights from Idaho to the United States?

    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 Idaho to the United States.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Idaho to the United States 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 Idaho to the United States?

    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 Idaho to the United States 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 Idaho to the United States?

    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 Idaho to the United States up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines fly most frequently to the United States?

    Idaho and United States are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (270 flights per week), Hawaiian Airlines (224 flights per week), and Delta (211 flights per week).

  • How many airports are there in the United States?

    There are 585 airports in the United States. The busiest airport is Hartsfield-Jackson Atlanta Airport (ATL), with 9% of all flights arriving there.

  • Which is the cheapest airport to fly into in the United States?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in the United States is San Diego Airport (SAN), with an average flight price of $199.

  • What is the cheapest flight to the United States?

    The cheapest ticket to the United States from Idaho found in the last 72 hours was to Las Vegas, at $51 round-trip. The most popular route is Boise (BOI) to Denver (DEN) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $129.

  • What is the cheapest month to fly from Idaho to the United States?

    The cheapest month for flights from Idaho to the United States is August, when tickets cost $258 (return) on average. On the other hand, the most expensive months are December and March, when the average cost of round-trip tickets is $527 and $460 respectively.

  • How many cities have direct flights to the United States?

    From Idaho, there are direct flights to the United States from 6 cities. The city with the most direct flights is Boise, with 1,485 direct flights each week.

  • How many direct flights to the United States are there each day?

    There are around 269 direct flights from within Idaho to the United States every day. Most flights (55%) depart in the morning.

  • How many direct flights to the United States are there each week?

    Each week there are around 1,878 direct flights from within Idaho to the United States. The most common day for departures is Sunday, with 16% of flights taking off on this day.

  • How long is the flight to the United States?

    An average nonstop flight from Idaho to the United States takes 4h 09m, covering a distance of 1376 miles. The shortest route is Spokane (GEG) to Seattle (SEA) with an average flight time of 1h 10m.

  • How many long-haul flights are there to the United States each week?

    Each week, there are 45 medium-haul flights (3-6 hour flight duration) and 1,833 short-haul flights (up to 3 hour flight duration) to the United States. There aren't any long-haul flights (6-12 hour flight duration).

  • What are the most popular destinations in the United States?

    Based on KAYAK flight searches, the most popular destination is Seattle (11% of total searches to the United States). The next most popular destinations are Las Vegas (8%) and Dallas (7%). Searches for flights to Los Angeles (6%), to Denver (5%) and to Chicago (5%) are also popular.

Reviews of the top airline flying from Idaho to the United States

 
Need help choosing which airline to fly with from Idaho to the United States? 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.
7.9
DeltaOverall score based on 8088 reviews
7.9Comfort
8.5Crew
8.1Boarding
7.8Entertainment
7.2Food
Airline reviews

The flight was delayed and oversold. I volunteered to give up my seat for compensation. Thinking I could get a good night's sleep instead of arriving home at 2 am. It took over an hour to get the new reservation confirmed, three different gate attendants, and two red coats. It took even longer to confirm the overnight hotel, and when I arrived, the line was 45 minutes long, with two people checking in, and at least 15 people slowly, very slowly—no food except frozen convenience food, no coupon for food from airlines. Slept, headed back to the airport, and that flight had an equipment change and a gate change just as they were about to board. It took an additional hour to board as they cleaned the plane from storage.

2.0 MediocreAnonymous, Jan 2026
ATL - FLL
Read more Delta reviews

The flight was delayed and oversold. I volunteered to give up my seat for compensation. Thinking I could get a good night's sleep instead of arriving home at 2 am. It took over an hour to get the new reservation confirmed, three different gate attendants, and two red coats. It took even longer to confirm the overnight hotel, and when I arrived, the line was 45 minutes long, with two people checking in, and at least 15 people slowly, very slowly—no food except frozen convenience food, no coupon for food from airlines. Slept, headed back to the airport, and that flight had an equipment change and a gate change just as they were about to board. It took an additional hour to board as they cleaned the plane from storage.

There was no wifi available on this flight. And there were no screens, no onboard entertainment, no entertainment options at all. It was like travelling in the 1990s again, except without even a main screen for options. Seats, as usual, were tight and uncomfortable.

Good seat comfort ORF to ATL. Bad seat ATL to SEA (terrible lumbar support, hard, ouch)..

Because I was moved to an exit row, the snacks in economy comfort, the selection of snacks was better.

I upgraded to first. Quick and easy boarding. Comfortable seat with power and a nice IPA.

Probably not the fault of Delta but there was delay after delay after delay and I ended up getting home 4 hours later then I should have at 1:30 in the morning

No in flight service, no explanation - FC got service, C+ did not, unsure about Economy. No turbulence to speak of, so I guess another way to cut cost, or promote health and well being of Delta employees? Also, boarding in MEM combined zones, and with overhead space already full on both flights after Zone 2/ Diamond, presents a huge challenge to find a space for a bag. Delta, other than point A to B, is no longer reasonable to fly - very poor experiences, not even taking into account the chastising at the gate and rude crews, across the board.

It would have been better if the flight wasn't delayed by 2.5 hours

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

Delta flight Delay for ,more that two hours i.e original flight was 6.30 PM and it starts at 8.45 PM, When we connect Delta team for meal vouchers as it is late arrival in designation,But we did not get it as per delta policy , which is not good for mid night arrival,

Everything you need to know for your flight to the United States

Cabin class types available on flights to Idaho

Cabin classes available on flights to Idaho. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to the United Statesfrom $257
Business Class flights to the United Statesfrom $152
Premium Economy Class flights to the United Statesfrom $198
Economy Class flights to the United Statesfrom $51