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Find cheap flights from Idaho to the United States from $40

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Idaho to the United States departing on 9/10. 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
0 bags
Fr 7/12
Fr 7/19

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In the last 7 days travelers have searched 44,212,782 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

June

Cheapest flight

$40
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from Boise to Seattle

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

See more FAQs

Book cheap flights from Idaho to the United States

Recent round-trip flight deals

6/22Sa
nonstopSpirit Airlines
1h 56mBOI-LAS
6/26Mi
nonstopSpirit Airlines
1h 58mLAS-BOI
$59
6/19Mi
nonstopSpirit Airlines
1h 56mBOI-LAS
6/25Di
nonstopSpirit Airlines
1h 58mLAS-BOI
$64
7/30Di
nonstop
1h 54mBOI-LAS
8/1Do
nonstop
1h 53mLAS-BOI
$71
7/11Do
nonstopAllegiant Air
1h 52mBOI-LAS
7/18Do
nonstopAllegiant Air
1h 53mLAS-BOI
$77
6/20Do
nonstopAllegiant Air
1h 49mBOI-LAS
6/27Do
nonstopAllegiant Air
1h 53mLAS-BOI
$78
7/20Sa
nonstop
1h 57mBOI-LAS
7/25Do
nonstop
1h 53mLAS-BOI
$85
8/21Mi
nonstopDelta
1h 37mBOI-SEA
8/27Di
nonstopDelta
1h 32mSEA-BOI
$137
8/24Sa
nonstopDelta
1h 17mGEG-SEA
9/11Mi
nonstopDelta
1h 13mSEA-GEG
$137
8/25So
nonstopUnited Airlines
1h 56mBOI-DEN
8/30Fr
nonstopUnited Airlines
1h 59mDEN-BOI
$155
8/10Sa
nonstopUnited Airlines
1h 57mBOI-DEN
8/19Mo
nonstopUnited Airlines
1h 55mDEN-BOI
$165

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Recent one-way flight deals

9/10Di
1 stopSpirit Airlines
9h 30mBOI-SEA
$40
9/17Di
1 stopSpirit Airlines
10h 22mBOI-LAX
$44
7/25Do
nonstopAllegiant Air
1h 52mBOI-LAS
$48
7/28So
nonstopAllegiant Air
1h 52mBOI-LAS
$49
8/10Sa
nonstopUnited Airlines
1h 57mBOI-DEN
$58
9/10Di
nonstopDelta
1h 47mBOI-SEA
$69
8/13Di
nonstopDelta
1h 19mGEG-SEA
$69
8/9Fr
nonstopAmerican Airlines
2h 38mGEG-PHX
$80
8/11So
nonstopUnited Airlines
1h 59mBOI-DEN
$81
9/23Mo
2 stopsAmerican Airlines
8h 08mBOI-LAS
$84

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Last minute flights from Idaho to the United States

Last minute flight, train and bus deals

6/13Do
nonstopSpirit Airlines
1h 56mBOI-LAS
6/17Mo
nonstopSpirit Airlines
1h 59mLAS-BOI
$123
6/15Sa
nonstopSpirit Airlines
1h 56mBOI-LAS
6/18Di
nonstopSpirit Airlines
2h 01mLAS-BOI
$124
6/14Fr
nonstopSpirit Airlines
1h 56mBOI-LAS
6/18Di
nonstopSpirit Airlines
2h 01mLAS-BOI
$125
6/13Do
nonstopAllegiant Air
1h 49mBOI-LAS
6/16So
nonstopAllegiant Air
1h 53mLAS-BOI
$177
6/15Sa
nonstop
1h 55mBOI-LAS
6/16So
nonstop
1h 53mLAS-BOI
$185
6/15Sa
nonstop
1h 55mBOI-LAS
6/16So
nonstop
1h 53mLAS-BOI
$189
6/12Mi
nonstopAlaska Airlines
1h 29mBOI-SEA
7/18Do
nonstopAlaska Airlines
1h 25mSEA-BOI
$322
6/12Mi
nonstopAlaska Airlines
1h 31mBOI-SEA
7/18Do
multi-stopAlaska Airlines
3h 50mSEA-BOI
$331
6/15Sa
multi-stopDelta
5h 14mGEG-PHX
6/17Mo
multi-stopDelta
7h 49mPHX-GEG
$386
6/14Fr
multi-stopDelta
6h 19mGEG-PHX
6/15Sa
multi-stopDelta
7h 49mPHX-GEG
$406

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Flights to the United States

Return flight deals:

United States - Idaho

Cabin classes:

$248
$336
$303
$45

Browse destinations:

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