Cheap flights to Ada County

View €76 flight on Mon, 26 Jan 2026Opens in a new window

Popular airlines to Ada County

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

  • American Airlines

    American Airlines

  • Southwest Airlines

    Southwest Airlines

  • Air France

    Air France

  • Air Canada

    Air Canada

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Cheap round-trip flights to Ada County

Prices were available within the past 7 days and start at €76 for one-way flights and €159 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 20 Feb - Mon, 23 Feb
PHX
Phoenix
BOI
Boise
€159 Return, found 18 hours ago
€159
Return
found 18 hours ago
Select Delta flight, departing Fri, 20 Feb from Phoenix to Boise, returning Mon, 23 Feb, priced at €159 found 18 hours ago
Delta
Fri, 20 Feb - Mon, 23 Feb
PHX
Phoenix
BOI
Boise
€168 Return, found 18 hours ago
€168
Return
found 18 hours ago
Select Delta flight, departing Fri, 20 Feb from Phoenix to Boise, returning Mon, 23 Feb, priced at €168 found 18 hours ago
American Airlines
Fri, 20 Feb - Mon, 23 Feb
PHX
Phoenix
BOI
Boise
€176 Return, found 18 hours ago
€176
Return
found 18 hours ago
Select American Airlines flight, departing Fri, 20 Feb from Phoenix to Boise, returning Mon, 23 Feb, priced at €176 found 18 hours ago
American Airlines
Sat, 17 Jan - Mon, 26 Jan
IAH
Houston
BOI
Boise
€238 Return, found 1 day ago
€238
Return
found 1 day ago
Select American Airlines flight, departing Sat, 17 Jan from Houston to Boise, returning Mon, 26 Jan, priced at €238 found 1 day ago
United
Fri, 20 Feb - Mon, 23 Feb
PHX
Phoenix
BOI
Boise
€297 Return, found 18 hours ago
€297
Return
found 18 hours ago
Select United flight, departing Fri, 20 Feb from Phoenix to Boise, returning Mon, 23 Feb, priced at €297 found 18 hours ago
Lufthansa
Mon, 26 Jan - Mon, 9 Feb
LHR
London
BOI
Boise
€648 Return, found 4 days ago
€648
Return
found 4 days ago
Select Lufthansa flight, departing Mon, 26 Jan from London to Boise, returning Mon, 9 Feb, priced at €648 found 4 days ago
Air Canada
Mon, 26 Jan - Mon, 9 Feb
LHR
London
BOI
Boise
€692 Return, found 4 days ago
€692
Return
found 4 days ago
Select Air Canada flight, departing Mon, 26 Jan from London to Boise, returning Mon, 9 Feb, priced at €692 found 4 days ago
Swiss International Air Lines
Fri, 23 Jan - Mon, 9 Feb
LCY
London
BOI
Boise
€735 Return, found 1 day ago
€735
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Fri, 23 Jan from London to Boise, returning Mon, 9 Feb, priced at €735 found 1 day ago
Virgin Atlantic
Mon, 26 Jan - Mon, 9 Feb
LHR
London
BOI
Boise
€735 Return, found 4 days ago
€735
Return
found 4 days ago
Select Virgin Atlantic flight, departing Mon, 26 Jan from London to Boise, returning Mon, 9 Feb, priced at €735 found 4 days ago
Iberia
Mon, 26 Jan - Mon, 9 Feb
LHR
London
BOI
Boise
€735 Return, found 4 days ago
€735
Return
found 4 days ago
Select Iberia flight, departing Mon, 26 Jan from London to Boise, returning Mon, 9 Feb, priced at €735 found 4 days ago

Trending flights to Ada County

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Tue, 27 Jan - Tue, 3 Feb
DUB
Dublin
BOI
Boise
€783 Return, found 6 days ago
€783
Return
found 6 days ago
Select Icelandair flight, departing Tue, 27 Jan from Dublin to Boise, returning Tue, 3 Feb, priced at €783 found 6 days ago

Frequently asked questions

How do I find cheap flights to Ada County that have flexible change policies?
We know that travel arrangements can change from one day to the next, so locking in a flexible ticket with Expedia makes sense. Just check the "No change fee" box below the "Flexible change policies" filter. Your low-cost, flexible flight to Ada County is just a few clicks away.
Which airlines fly to Ada County?
When you're ready to reserve your airfare to or near Ada County, these quality carriers look forward to welcoming you aboard:

  • Alaska Airlines - 754 flights to or near Ada County each month, including 754 flights to Boise Airport (BOI) per month.
  • Delta Air Lines - 489 flights to or near Ada County each month, including 489 flights to Boise Airport (BOI) per month.
  • United Airlines - 303 flights to or near Ada County each month, including 303 flights to Boise Airport (BOI) per month.

How can I find cheap tickets to Ada County?
In the last seven days, €159 was the best price for a flight to Ada County. For even bigger savings, book ahead of time and be flexible with your travel dates. Search for your flight to Ada County, then see prices for similar time frames by clicking on our "flexible dates" link.
How much is a flight to Ada County?
In the last seven days, round-trip tickets to Ada County sold for as low as €159 and peaked at €783. For one-way trips out of Phoenix (PHX), the lowest price during this time was €76.
What are the most popular airports to fly into in Ada County?
The number one gateway to Ada County, roughly 1,994 flights land at Boise Airport (BOI) each month. Find an awesome deal, lock in your seat and get set to soak up the best of this sensational region.
How much is a plane ticket to Ada County?
In the last seven days, tickets to Ada County varied between €159 and €783. Prices tend to go up over time, so snap up a good deal today.
What is the best time to go to Ada County?
Summer begins June 20 in the Northern Hemisphere, and these warmer months are a fabulous time to head to the major Ada County city of Boise. Average temperatures range between 16ºC and 27ºC throughout this season. The largest crowds can be found here in March, May and August.
What months are the cheapest to book a flight to Ada County?
The best month to purchase budget flights to Ada County is February. Remember that in the U.S, an expensive time to secure a seat is the festive month of December.

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About Ada County

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About Ada County

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