Cheap Flights to Jefferson County from $79

View $79 flight on Fri, Feb 6, 2026Opens in a new window

Popular airlines to Jefferson County

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

  • American Airlines

    American Airlines

  • Hawaiian Airlines

    Hawaiian Airlines

  • KLM

    KLM

  • Aeromexico

    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 $79 for one-way flights and $137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Jan 31 - Sat, Feb 7
SEA
Seattle
IDA
Idaho Falls
$137 Roundtrip, found 1 day ago
$137
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Jan 31 from Seattle to Idaho Falls, returning Sat, Feb 7, priced at $137 found 1 day ago
Delta
Tue, Feb 10 - Wed, Feb 11
SEA
Seattle
IDA
Idaho Falls
$147 Roundtrip, found 22 hours ago
$147
Roundtrip
found 22 hours ago
Select Delta flight, departing Tue, Feb 10 from Seattle to Idaho Falls, returning Wed, Feb 11, priced at $147 found 22 hours ago
Alaska Airlines
Fri, Jan 30 - Mon, Feb 2
PDX
Portland
IDA
Idaho Falls
$157 Roundtrip, found 1 day ago
$157
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Jan 30 from Portland to Idaho Falls, returning Mon, Feb 2, priced at $157 found 1 day ago
Delta
Wed, Mar 18 - Sat, Mar 21
SEA
Seattle
IDA
Idaho Falls
$157 Roundtrip, found 21 hours ago
$157
Roundtrip
found 21 hours ago
Select Delta flight, departing Wed, Mar 18 from Seattle to Idaho Falls, returning Sat, Mar 21, priced at $157 found 21 hours ago
Alaska Airlines
Tue, Feb 3 - Wed, Feb 4
SEA
Seattle
IDA
Idaho Falls
$162 Roundtrip, found 2 days ago
$162
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Feb 3 from Seattle to Idaho Falls, returning Wed, Feb 4, priced at $162 found 2 days ago
Alaska Airlines
Tue, Feb 3 - Sat, Feb 7
SEA
Seattle
IDA
Idaho Falls
$164 Roundtrip, found 3 days ago
$164
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Feb 3 from Seattle to Idaho Falls, returning Sat, Feb 7, priced at $164 found 3 days ago
Alaska Airlines
Tue, Feb 10 - Wed, Feb 11
SEA
Seattle
IDA
Idaho Falls
$165 Roundtrip, found 22 hours ago
$165
Roundtrip
found 22 hours ago
Select Alaska Airlines flight, departing Tue, Feb 10 from Seattle to Idaho Falls, returning Wed, Feb 11, priced at $165 found 22 hours ago
Hawaiian Airlines
Tue, Mar 24 - Tue, Apr 14
SEA
Seattle
IDA
Idaho Falls
$167 Roundtrip, found 1 day ago
$167
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, Mar 24 from Seattle to Idaho Falls, returning Tue, Apr 14, priced at $167 found 1 day ago
United
Thu, Mar 19 - Sun, Mar 22
DEN
Denver
IDA
Idaho Falls
$189 Roundtrip, found 2 hours ago
$189
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Mar 19 from Denver to Idaho Falls, returning Sun, Mar 22, priced at $189 found 2 hours ago
American Airlines
Mon, Jan 26 - Sat, Jan 31
DEN
Denver
IDA
Idaho Falls
$225 Roundtrip, found 3 days ago
$225
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Jan 26 from Denver to Idaho Falls, returning Sat, Jan 31, priced at $225 found 3 days ago

Airports in Jefferson County

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Idaho Falls Regional IDA. Cheapest option available. Flights from $486
IDA
Idaho Falls Regional
Cheapest
Flights from $486

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

Jefferson County Flights Information

Airlines serving
Alaska Airlines, Delta, American Airlines, Hawaiian Airlines, United
Roundtrip price
from $137

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, $137 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 Portland (PDX) sold for as little as $79 in the last seven days. During this period, the price of a round-trip fare to Jefferson County varied between $137 and $225. 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 $137 to $225.
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.

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.

Alaska Airlines
Sat, Jan 31 - Sat, Feb 7
SEA
Seattle
IDA
Idaho Falls
$137 Roundtrip, found 1 day ago
$137
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Jan 31 from Seattle to Idaho Falls, returning Sat, Feb 7, priced at $137 found 1 day ago
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