$29 Find Cheap Flights from Idaho to the United States

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Good to know

Low seasonSeptember
Cheapest flight$29
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 14% 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 Hawaiian AirlinesIDA-SEAJun 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 AirlinesBOI-PDXMay 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 AirlinesBOI-BURJul 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 (249 flights per week), Hawaiian Airlines (229 flights per week), and Delta (205 flights per week).

  • How many airports are there in the United States?

    There are 581 airports in the United States. The busiest airport is Hartsfield-Jackson Atlanta Airport (ATL), with 8% 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 $203.

  • What is the cheapest day to fly to the United States?

    Based on KAYAK data, the cheapest day to fly to the United States is Wednesday where round-trip tickets can be as cheap as $391. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $551 on average.

  • What is the cheapest time of day to fly to the United States?

    The cheapest time of day to fly to the United States is generally in the afternoon, when round-trip flights cost $414 on average. Morning departures are around 2% more expensive than evening flights, on average. The most expensive time of day to fly to the United States is generally in the morning, which is peak travel time and where the average cost of a ticket is $503.

  • 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 $88 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 $159.

  • 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 March and December, when the average cost of round-trip tickets is $500 and $488 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 1,820 direct flights each week.

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

    There are around 318 direct flights from within Idaho to the United States every day. Most flights (50%) depart in the morning.

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

    Each week there are around 2,222 direct flights from within Idaho to the United States. The most common day for departures is Sunday, with 18% 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 3h 58m, covering a distance of 1331 miles. The shortest route is Spokane (GEG) to Seattle (SEA) with an average flight time of 1h 07m.

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

    Each week, there are 44 medium-haul flights (3-6 hour flight duration) and 1,871 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 (12% of total searches to the United States). The next most popular destinations are Las Vegas (7%) and Los Angeles (7%). Searches for flights to Denver (6%), to Dallas (6%) and to New York (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 7975 reviews
7.9Entertainment
8.5Crew
7.3Food
8.2Boarding
7.9Comfort
Airline reviews

On time flight. Seat comfort could be better in the Comfort section.

10.0 ExcellentMichael, Oct 2025CLT - MSP
Read more Delta reviews

On time flight. Seat comfort could be better in the Comfort section.

My issue was with TSA agents for delta airlines. My luggage got flagged. The agent was going thru another persons first. He took 20 min to go thru hers. I asked them to bring mine closer so I could sit down . They said you can go sit it will be fine. I said I am supposed to keep my eyes on my bags at all times. The agent was meticulously unwrapping 2 gifts that the lady had and then tried to re warp it. He was trying to be kind i get it but 20 min for me to stand watching him do that was ridiculous. It was 6 am and there were a ton of travelers. Mine was flagged for some air packed tea that I bought in Turkey. My previous delta flight and 2 others before didn’t flag it. Consistency would be nice. Also on the flight the window shades were down for take off and landing - I thought that was very odd I thought they had to remain open for take off and landing.

The flight was an hour and a half late departing which was inconvenient

Delay in SLC jammed us up in Chicago. Got caught up in rush hour traffic

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

The flight was great. The gate location was way to far away!!!

The flight attendant in first class was beyond rude and didn't care at all about her job. AND the gate agent was even worse than the flight attendant for rudeness. She was awful.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

Cramped seating for me. Luckily it wasn’t a long flight

Lounge in Lagos is terrible, food on board from Lagos to Atlanta was horrible. Only bright spot the cabin crew were awesome.

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 $348
Prem Econ Class flights to the United Statesfrom $198
Economy Class flights to the United Statesfrom $82

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