Cheap flights to Ada County

View €64 flight on Sat, 7 Feb 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

  • Frontier Airlines

    Frontier Airlines

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Cheap round-trip flights to Ada County

Prices were available within the past 7 days and start at €64 for one-way flights and €86 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 30 Jan - Sun, 1 Feb
SEA
Seattle
BOI
Boise
€86 Return, found 5 days ago
€86
Return
found 5 days ago
Select Delta flight, departing Fri, 30 Jan from Seattle to Boise, returning Sun, 1 Feb, priced at €86 found 5 days ago
Delta
Thu, 5 Feb - Sun, 8 Feb
SEA
Seattle
BOI
Boise
€121 Return, found 1 day ago
€121
Return
found 1 day ago
Select Delta flight, departing Thu, 5 Feb from Seattle to Boise, returning Sun, 8 Feb, priced at €121 found 1 day ago
Delta
Sat, 7 Feb - Sun, 8 Feb
PDX
Portland
BOI
Boise
€135 Return, found 20 hours ago
€135
Return
found 20 hours ago
Select Delta flight, departing Sat, 7 Feb from Portland to Boise, returning Sun, 8 Feb, priced at €135 found 20 hours ago
Delta
Fri, 30 Jan - Sun, 1 Feb
SEA
Seattle
BOI
Boise
€137 Return, found 5 days ago
€137
Return
found 5 days ago
Select Delta flight, departing Fri, 30 Jan from Seattle to Boise, returning Sun, 1 Feb, priced at €137 found 5 days ago
Delta
Thu, 5 Feb - Sun, 8 Feb
SEA
Seattle
BOI
Boise
€145 Return, found 1 day ago
€145
Return
found 1 day ago
Select Delta flight, departing Thu, 5 Feb from Seattle to Boise, returning Sun, 8 Feb, priced at €145 found 1 day ago
Delta
Fri, 30 Jan - Sun, 1 Feb
SEA
Seattle
BOI
Boise
€154 Return, found 5 days ago
€154
Return
found 5 days ago
Select Delta flight, departing Fri, 30 Jan from Seattle to Boise, returning Sun, 1 Feb, priced at €154 found 5 days ago
United
Fri, 30 Jan - Sun, 1 Feb
SEA
Seattle
BOI
Boise
€162 Return, found 5 days ago
€162
Return
found 5 days ago
Select United flight, departing Fri, 30 Jan from Seattle to Boise, returning Sun, 1 Feb, priced at €162 found 5 days ago
American Airlines
Mon, 23 Feb - Tue, 3 Mar
ORD
Chicago
BOI
Boise
€232 Return, found 1 day ago
€232
Return
found 1 day ago
Select American Airlines flight, departing Mon, 23 Feb from Chicago to Boise, returning Tue, 3 Mar, priced at €232 found 1 day ago
WestJet
Sat, 14 Feb - Wed, 18 Feb
YVR
Vancouver
BOI
Boise
€457 Return, found 1 day ago
€457
Return
found 1 day ago
Select WestJet flight, departing Sat, 14 Feb from Vancouver to Boise, returning Wed, 18 Feb, priced at €457 found 1 day ago
Air Canada
Sat, 14 Feb - Wed, 18 Feb
YVR
Vancouver
BOI
Boise
€505 Return, found 1 day ago
€505
Return
found 1 day ago
Select Air Canada flight, departing Sat, 14 Feb from Vancouver to Boise, returning Wed, 18 Feb, priced at €505 found 1 day ago

About Ada County

Expedia offers flights to Ada County to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Ada County or destinations around the world and discover how easy it is to make your flight reservations on Expedia.

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, €86 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 €86 and peaked at €762. For one-way trips out of Portland (PDX), the lowest price during this time was €64.
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 €86 and €762. 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.

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
Mon, 2 Mar - Wed, 11 Mar
DUB
Dublin
BOI
Boise
€762 Return, found 13 hours ago
€762
Return
found 13 hours ago
Select Icelandair flight, departing Mon, 2 Mar from Dublin to Boise, returning Wed, 11 Mar, priced at €762 found 13 hours ago
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