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Cheap Flights to Jefferson County from $116

View $116 flight on Wed, Aug 26, 2026Opens in a new window

Popular airlines to Jefferson County

  • Alaska Airlines

  • United

  • Delta

  • American Airlines

  • KLM

  • Air France

  • Aeromexico

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How much is the cheapest flight to Jefferson County?

Prices were available within the past 7 days and start at $116 for one-way flights and $231 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Aug 26 - Sat, Aug 29
LAX
Los Angeles
IDA
Idaho Falls
$231 Roundtrip, found 2 hours ago
$231
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Aug 26 from Los Angeles to Idaho Falls, returning Sat, Aug 29, priced at $231 found 2 hours ago
Alaska Airlines
Sat, Oct 24 - Sat, Oct 31
PDX
Portland
IDA
Idaho Falls
$237 Roundtrip, found 8 hours ago
$237
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Portland to Idaho Falls, returning Sat, Oct 31, priced at $237 found 8 hours ago
Delta
Tue, Aug 11 - Wed, Aug 12
LAX
Los Angeles
IDA
Idaho Falls
$241 Roundtrip, found 3 days ago
$241
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 11 from Los Angeles to Idaho Falls, returning Wed, Aug 12, priced at $241 found 3 days ago
Alaska Airlines
Sat, Oct 24 - Sat, Oct 31
PDX
Portland
IDA
Idaho Falls
$247 Roundtrip, found 8 hours ago
$247
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Portland to Idaho Falls, returning Sat, Oct 31, priced at $247 found 8 hours ago
United
Tue, Oct 27 - Tue, Nov 3
SAN
San Diego
IDA
Idaho Falls
$251 Roundtrip, found 2 hours ago
$251
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Oct 27 from San Diego to Idaho Falls, returning Tue, Nov 3, priced at $251 found 2 hours ago
Delta
Tue, Oct 27 - Tue, Nov 3
SAN
San Diego
IDA
Idaho Falls
$251 Roundtrip, found 2 hours ago
$251
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Oct 27 from San Diego to Idaho Falls, returning Tue, Nov 3, priced at $251 found 2 hours ago
Delta
Fri, Jul 17 - Tue, Jul 21
LAX
Los Angeles
IDA
Idaho Falls
$256 Roundtrip, found 3 hours ago
$256
Roundtrip
found 3 hours ago
Select Delta flight, departing Fri, Jul 17 from Los Angeles to Idaho Falls, returning Tue, Jul 21, priced at $256 found 3 hours ago
Delta
Tue, Jul 7 - Sat, Jul 11
SAN
San Diego
IDA
Idaho Falls
$256 Roundtrip, found 2 days ago
$256
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Jul 7 from San Diego to Idaho Falls, returning Sat, Jul 11, priced at $256 found 2 days ago
American Airlines
Sat, Sep 26 - Fri, Oct 2
ORD
Chicago
IDA
Idaho Falls
$290 Roundtrip, found 8 hours ago
$290
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Sat, Sep 26 from Chicago to Idaho Falls, returning Fri, Oct 2, priced at $290 found 8 hours ago
Delta
Tue, Nov 10 - Sat, Nov 14
LAS
Las Vegas
IDA
Idaho Falls
$301 Roundtrip, found 4 hours ago
$301
Roundtrip
found 4 hours ago
Select Delta flight, departing Tue, Nov 10 from Las Vegas to Idaho Falls, returning Sat, Nov 14, priced at $301 found 4 hours ago
Book with confidence

Enjoy extra legroom, flight flexibility, and a seamless travel experience.

Trending flights to Jefferson County

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

Delta
Wed, Aug 26 - Sat, Aug 29
LAX
Los Angeles
IDA
Idaho Falls
$231 Roundtrip, found 2 hours ago
$231
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Aug 26 from Los Angeles to Idaho Falls, returning Sat, Aug 29, priced at $231 found 2 hours ago

Frequently asked questions

How do I find cheap flights to Jefferson County that have flexible change policies?
When it comes to flying these days, flexibility is a must. That's why we've added a "No change fee" filter to help you track down flexible, low-priced flights to Jefferson County. It's to the left of your screen directly under the "Flexible change policies" subheading.
Which airlines fly to Jefferson County?
Find a seat with one of these airlines and the lively region of Jefferson County will be yours to explore:

  • United Airlines - 91 flights to or near Jefferson County each month, including 91 flights to Idaho Falls Regional Airport (IDA) per month.
  • Delta Air Lines - 86 flights to or near Jefferson County each month, including 86 flights to Idaho Falls Regional Airport (IDA) per month.
  • Allegiant Air - 65 flights to or near Jefferson County each month, including 65 flights to Idaho Falls Regional Airport (IDA) per month.

How can I find cheap tickets to Jefferson County?
In the last seven days, $231 was the lowest price for a flight to Jefferson County. For an even cheaper fare, book ahead of time and be flexible with your travel dates. Search for your trip to Jefferson County, then check out prices for nearby days by clicking on our "flexible dates" link.
How much is a flight to Jefferson County?
One-way flights departing from Los Angeles (LAX) sold for as little as $116 in the last seven days. During this period, the price of a round-trip fare to Jefferson County varied between $231 and $301. If you find a fantastic deal, book as fast as you can — these fares don't stick around for long.
What are the most popular airports to fly into in Jefferson County?
Idaho Falls Regional Airport (IDA) is the primary gateway for people traveling into and out of Jefferson County. Roughly 334 flights per month touch down at this airport.
When is the cheapest time to fly to Jefferson County?
Take off to Jefferson County early on in the week and you'll usually be rewarded with cheaper fares. Tuesday is known for being the cheapest day to hop on a plane, closely followed by Monday. If you're hoping to avoid the costliest flights, stay away from Saturdays.
How much is a plane ticket to Jefferson County?
In the last seven days, plane fares to Jefferson County ranged from $231 to $301.
What months are the cheapest to book a flight to Jefferson County?
The ideal month to book a fantastic deal to Jefferson County is February, whereas prices are at a premium in December. Keep clear of this month if you're counting your pennies.
How long is a flight to Jefferson County?
It could be an hour or two or longer — it really depends on which part of the States you're setting off from. The average flight times for these leading domestic routes to Jefferson County will give you a good idea of what to expect:

  • Denver, CO (DEN-Denver Intl.) to Idaho Falls Regional Airport (IDA) - 1 hour and 41 minutes
  • Dallas, TX (DFW-Dallas-Fort Worth Intl.) to Idaho Falls Regional Airport (IDA) - 3 hours and 1 minute
  • Salt Lake City, UT (SLC-Salt Lake City Intl.) to Idaho Falls Regional Airport (IDA) - 1 hour and 6 minutes

What is the best time to go to Jefferson County?
Rigby, Jefferson County's leading city, is a great place to tour around at anytime. Don't like the cold? Then journey here from June 20 onward in summer, when temperatures range from 50ºF to 80ºF. June, July and August is when Rigby draws the biggest crowds.

Book with confidence

Enjoy extra legroom, flight flexibility, and a seamless travel experience.

Travel information

*Flight schedules are subject to change.

*Available to One Key members.

 

*Flight schedules are subject to change.

*Available to One Key members.