$39 Find Cheap Flights from Idaho to the United States

1 adult
1 adult, Economy

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 20% 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 seasonJanuary
High seasonJuly
Cheapest flight$39
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Spokane to Los Angeles

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 
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 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 Las Vegas Harry Reid Intl Airport (LAS), with an average flight price of $167.

  • 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 $54 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 $162.

  • 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 July, when tickets cost $358 (return) on average. On the other hand, the most expensive months are June and May, when the average cost of round-trip tickets is $474 and $428 respectively.

  • How long is the flight to the United States?

    An average nonstop flight from Idaho to the United States takes 4h 01m, covering a distance of 1293 miles. The shortest route is Spokane (GEG) to Seattle (SEA) with an average flight time of 1h 09m.

  • 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 New York (9%) and Las Vegas (8%). Searches for flights to Chicago (7%), to Denver (6%) and to Los Angeles (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.
8.0
DeltaOverall score based on 7965 reviews
7.9Entertainment
7.3Food
7.9Comfort
8.5Crew
8.2Boarding
Airline reviews

I like for how they process during check in. It was very smoothly.

10.0 ExcellentAbdulla, Jun 2025CMH - JFK
Read more Delta reviews

I like for how they process during check in. It was very smoothly.

The flight was scheduled for 2:30 PM. Early in the morning we got a text message saying the flight was delayed and rescheduled for 3:00 PM. We got to the airport with that in mind. Then we got a message during check-in at the flight was rescheduled again for 2:30 PM. We almost missed our flight. In fact, our bags Were told that they would not make it. At the end, everything worked out. But it is very stressful.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent check-in. Crew was good. Excellent communication from flight deck.

Great overall. There was a bit of turbulence so they could only serve water because too much turbulence for the carts. Was glad they prioritized safety though

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

Book cheap flights from Idaho to the United States

Recent round-trip flight deals

8/1Fri
nonstopAllegiant Air
2h 39mGEG-LAX
8/4Mon
nonstopAllegiant Air
2h 35mLAX-GEG
$78
8/25Mon
nonstopAllegiant Air
2h 39mGEG-LAX
9/1Mon
nonstopAllegiant Air
2h 35mLAX-GEG
$79
7/18Fri
nonstopSpirit Airlines
1h 51mBOI-LAS
7/21Mon
nonstopSpirit Airlines
1h 47mLAS-BOI
$104
7/21Mon
nonstopSpirit Airlines
1h 51mBOI-LAS
7/25Fri
nonstopSpirit Airlines
1h 47mLAS-BOI
$106
8/16Sat
nonstopDelta
1h 42mBOI-SEA
8/23Sat
nonstopDelta
1h 36mSEA-BOI
$117
8/12Tue
nonstopAlaska Airlines
1h 19mBOI-PDX
8/16Sat
nonstopAlaska Airlines
1h 14mPDX-BOI
$117
8/26Tue
nonstop
2h 47mGEG-LAX
9/1Mon
nonstop
2h 35mLAX-GEG
$117
8/26Tue
1 stop
5h 23mGEG-LAX
9/1Mon
nonstop
2h 35mLAX-GEG
$125
10/14Tue
nonstopAlaska Airlines
1h 15mGEG-SEA
10/14Tue
nonstopAlaska Airlines
1h 14mSEA-GEG
$131
10/8Wed
nonstopDelta
1h 23mGEG-SEA
10/15Wed
nonstopDelta
1h 08mSEA-GEG
$137

Search by stops

Search by airline

Search by price

Recent one-way flight deals

8/1Fri
nonstopAllegiant Air
2h 39mGEG-LAX
$39
7/18Fri
nonstopAllegiant Air
2h 39mGEG-LAX
$40
9/8Mon
nonstopSpirit Airlines
1h 51mBOI-LAS
$51
9/15Mon
nonstopSpirit Airlines
1h 51mBOI-LAS
$53
11/12Wed
nonstopHawaiian Airlines
1h 16mGEG-SEA
$65
10/7Tue
nonstopHawaiian Airlines
2h 01mBOI-LAS
$67
10/19Sun
nonstopAlaska Airlines
2h 01mBOI-LAS
$68
8/16Sat
nonstopDelta
1h 12mGEG-SEA
$69
10/19Sun
1 stopDelta
5h 17mBOI-LAS
$79
7/30Wed
nonstopAlaska Airlines
2h 00mBOI-LAS
$81

Search by stops

Search by airline

Search by price

Last minute flights from Idaho to the United States

Last minute flight, train and bus deals

6/20Fri
nonstopAllegiant Air
2h 39mGEG-LAX
6/23Mon
nonstopAllegiant Air
2h 35mLAX-GEG
$133
6/20Fri
nonstopAllegiant Air
2h 39mGEG-LAX
6/23Mon
nonstopAllegiant Air
2h 35mLAX-GEG
$160
6/19Thu
multi-stop
22h 02mGEG-LAX
6/20Fri
nonstop
2h 35mLAX-GEG
$241
6/19Thu
multi-stopFrontier
12h 31mGEG-LAX
6/21Sat
multi-stopFrontier
22h 59mLAX-GEG
$278
6/21Sat
multi-stop
7h 21mBOI-LAS
7/4Fri
nonstop
1h 38mLAS-BOI
$294
6/20Fri
nonstopSpirit Airlines
1h 57mBOI-LAS
6/23Mon
nonstopSpirit Airlines
1h 38mLAS-BOI
$299
6/22Sun
nonstopFrontier
1h 58mBOI-DEN
6/26Thu
nonstopFrontier
1h 57mDEN-BOI
$319
6/18Wed
multi-stopDelta
5h 12mBOI-ORD
6/25Wed
multi-stopDelta
5h 59mORD-BOI
$341
6/21Sat
multi-stopDelta
8h 09mBOI-ORD
6/25Wed
multi-stopDelta
5h 59mORD-BOI
$342
6/20Fri
nonstopSpirit Airlines
1h 57mBOI-LAS
6/23Mon
nonstopSpirit Airlines
1h 38mLAS-BOI
$357

Search by stops

Search by airline

Search by price

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.

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.