A rainbow over a field with buildings in the background.

Ada County Flights - Book Cheap Flights to Ada County

View RM444 flight on Wed, 19 Aug 2026Opens in a new window

Popular airlines to Ada County

  • Alaska Airlines

  • Delta

  • United

  • American Airlines

  • Southwest Airlines

  • Frontier Airlines

  • Air Canada

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Ada County

Prices were available within the past 7 days and start at RM444 for one-way flights and RM806 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 1 Aug - Thu, 6 Aug
SEA
Seattle
BOI
Boise
RM806 Return, found 1 day ago
RM806
Return
found 1 day ago
Select Delta flight, departing Sat, 1 Aug from Seattle to Boise, returning Thu, 6 Aug, priced at RM806 found 1 day ago
Delta
Sat, 1 Aug - Thu, 6 Aug
SEA
Seattle
BOI
Boise
RM892 Return, found 1 day ago
RM892
Return
found 1 day ago
Select Delta flight, departing Sat, 1 Aug from Seattle to Boise, returning Thu, 6 Aug, priced at RM892 found 1 day ago
Delta
Fri, 31 Jul - Thu, 6 Aug
SEA
Seattle
BOI
Boise
RM1,214 Return, found 1 day ago
RM1,214
Return
found 1 day ago
Select Delta flight, departing Fri, 31 Jul from Seattle to Boise, returning Thu, 6 Aug, priced at RM1,214 found 1 day ago
Delta
Sat, 1 Aug - Thu, 6 Aug
SEA
Seattle
BOI
Boise
RM1,236 Return, found 1 day ago
RM1,236
Return
found 1 day ago
Select Delta flight, departing Sat, 1 Aug from Seattle to Boise, returning Thu, 6 Aug, priced at RM1,236 found 1 day ago
Delta
Fri, 31 Jul - Thu, 6 Aug
SEA
Seattle
BOI
Boise
RM1,255 Return, found 1 day ago
RM1,255
Return
found 1 day ago
Select Delta flight, departing Fri, 31 Jul from Seattle to Boise, returning Thu, 6 Aug, priced at RM1,255 found 1 day ago
Delta
Sat, 1 Aug - Thu, 6 Aug
SEA
Seattle
BOI
Boise
RM1,296 Return, found 1 day ago
RM1,296
Return
found 1 day ago
Select Delta flight, departing Sat, 1 Aug from Seattle to Boise, returning Thu, 6 Aug, priced at RM1,296 found 1 day ago
Delta
Mon, 24 Aug - Mon, 31 Aug
ORD
Chicago
BOI
Boise
RM1,337 Return, found 7 hours ago
RM1,337
Return
found 7 hours ago
Select Delta flight, departing Mon, 24 Aug from Chicago to Boise, returning Mon, 31 Aug, priced at RM1,337 found 7 hours ago
Delta
Mon, 24 Aug - Mon, 31 Aug
ORD
Chicago
BOI
Boise
RM1,338 Return, found 7 hours ago
RM1,338
Return
found 7 hours ago
Select Delta flight, departing Mon, 24 Aug from Chicago to Boise, returning Mon, 31 Aug, priced at RM1,338 found 7 hours ago
United
Mon, 24 Aug - Mon, 31 Aug
ORD
Chicago
BOI
Boise
RM1,481 Return, found 7 hours ago
RM1,481
Return
found 7 hours ago
Select United flight, departing Mon, 24 Aug from Chicago to Boise, returning Mon, 31 Aug, priced at RM1,481 found 7 hours ago
American Airlines
Wed, 19 Aug - Wed, 26 Aug
ORD
Chicago
BOI
Boise
RM1,738 Return, found 5 days ago
RM1,738
Return
found 5 days ago
Select American Airlines flight, departing Wed, 19 Aug from Chicago to Boise, returning Wed, 26 Aug, priced at RM1,738 found 5 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, RM806 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 RM806 and peaked at RM1,738. For one-way trips out of Seattle (SEA), the lowest price during this time was RM444.
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 RM806 and RM1,738. 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.

Book with confidence

About Ada County

Expedia offers flights to Ada County to meet every traveler'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.
About Ada County
*Available to Expedia members.