Red Rocks at sunrise, near Denver Colorado

Cheap flights to Jefferson County

View €86 flight on Wed, 2 Sept 2026Opens in a new window

Flight 1

Flight 2

Popular airlines to Jefferson County

  • Frontier Airlines

  • American Airlines

  • United

  • Delta

  • Alaska Airlines

  • Southwest Airlines

  • JetBlue Airways

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Cheap round-trip flights to Jefferson County

Prices were available within the past 7 days and start at €86 for one-way flights and €152 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, 2 Sept - Thu, 17 Sept
ORD
Chicago
DEN
Denver
€152 Return, found 3 days ago
€152
Return
found 3 days ago
Select American Airlines flight, departing Wed, 2 Sept from Chicago to Denver, returning Thu, 17 Sept, priced at €152 found 3 days ago
Delta
Wed, 2 Sept - Thu, 17 Sept
MDW
Chicago
DEN
Denver
€177 Return, found 3 days ago
€177
Return
found 3 days ago
Select Delta flight, departing Wed, 2 Sept from Chicago to Denver, returning Thu, 17 Sept, priced at €177 found 3 days ago
Delta
Wed, 2 Sept - Thu, 17 Sept
ORD
Chicago
DEN
Denver
€177 Return, found 3 days ago
€177
Return
found 3 days ago
Select Delta flight, departing Wed, 2 Sept from Chicago to Denver, returning Thu, 17 Sept, priced at €177 found 3 days ago
Delta
Wed, 29 Jul - Wed, 5 Aug
LAS
Las Vegas
DEN
Denver
€200 Return, found 13 hours ago
€200
Return
found 13 hours ago
Select Delta flight, departing Wed, 29 Jul from Las Vegas to Denver, returning Wed, 5 Aug, priced at €200 found 13 hours ago
United
Wed, 2 Sept - Thu, 17 Sept
ORD
Chicago
DEN
Denver
€222 Return, found 3 days ago
€222
Return
found 3 days ago
Select United flight, departing Wed, 2 Sept from Chicago to Denver, returning Thu, 17 Sept, priced at €222 found 3 days ago
JetBlue Airways
Thu, 9 Jul - Mon, 13 Jul
ORD
Chicago
DEN
Denver
€394 Return, found 4 days ago
€394
Return
found 4 days ago
Select JetBlue Airways flight, departing Thu, 9 Jul from Chicago to Denver, returning Mon, 13 Jul, priced at €394 found 4 days ago
American Airlines
Fri, 26 Jun - Mon, 29 Jun
DUB
Dublin
DEN
Denver
€470 Return, found 6 days ago
€470
Return
found 6 days ago
Select American Airlines flight, departing Fri, 26 Jun from Dublin to Denver, returning Mon, 29 Jun, priced at €470 found 6 days ago
Iberia
Tue, 16 Jun - Sun, 21 Jun
DUB
Dublin
DEN
Denver
€470 Return, found 6 days ago
€470
Return
found 6 days ago
Select Iberia flight, departing Tue, 16 Jun from Dublin to Denver, returning Sun, 21 Jun, priced at €470 found 6 days ago
Icelandair
Mon, 5 Oct - Sun, 11 Oct
DUB
Dublin
DEN
Denver
€569 Return, found 11 hours ago
€569
Return
found 11 hours ago
Select Icelandair flight, departing Mon, 5 Oct from Dublin to Denver, returning Sun, 11 Oct, priced at €569 found 11 hours ago
British Airways
Fri, 23 Oct - Sat, 31 Oct
DUB
Dublin
DEN
Denver
€589 Return, found 3 days ago
€589
Return
found 3 days ago
Select British Airways flight, departing Fri, 23 Oct from Dublin to Denver, returning Sat, 31 Oct, priced at €589 found 3 days ago

Trending flights to Jefferson 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.

American Airlines
Fri, 26 Jun - Mon, 29 Jun
DUB
Dublin
DEN
Denver
€470 Return, found 6 days ago
€470
Return
found 6 days ago
Select American Airlines flight, departing Fri, 26 Jun from Dublin to Denver, returning Mon, 29 Jun, priced at €470 found 6 days ago

Frequently asked questions

How do I find cheap flights to Jefferson County that have flexible change policies?
We know that travel arrangements can change from one minute to the next, so booking a flexible ticket with Expedia is always a smart move. Simply tick the "No change fee" box under the "Flexible change policies" filter. Your well-priced and flexible flight to Jefferson County is just a few clicks away.
Which airlines fly to Jefferson County?
Dig out your passport, pack your bags and choose from these leading airlines that operate flights in or near Jefferson County:

  • United Airlines - 13,033 flights to or near Jefferson County each month, including 13,033 flights to Denver Intl. Airport (DEN) per month.
  • Southwest Airlines - 6,339 flights to or near Jefferson County each month, including 6,339 flights to Denver Intl. Airport (DEN) per month.
  • Frontier Airlines - 1,967 flights to or near Jefferson County each month, including 1,967 flights to Denver Intl. Airport (DEN) per month.

How can I find cheap tickets to Jefferson County?
You'll always walk away with an awesome deal with Expedia, but our "flexible dates" feature makes it even easier. Enter your preferred flight date, then check the flexible dates box above to compare prices for nearby days. €152 was the best price for a flight to Jefferson County in the last seven days.
How much is a flight to Jefferson County?
There were lots of cheap fares up for grabs in the last seven days, with the price of a return flight to Jefferson County varying between €152 and €589. Many lucky holiday makers purchased one-way seats from Chicago (MDW) for as low as €86.
What are the most popular airports to fly into in Jefferson County?
Denver Intl. Airport (DEN) is the primary gateway for many hoping to explore Jefferson County. Approximately 24,249 monthly flights touch down here.
How much is a plane ticket to Jefferson County?
In the last seven days, airfares to Jefferson County ranged between €152 and €589. The early bird catches the worm, so grab a terrific deal today.
What is the best time to go to Jefferson County?
If you'd love to experience Jefferson County's most populous city when it's buzzing, head for Pine sometime in March, May and July. Similar to most destinations in the Northern Hemisphere, summertime here begins June 20, with average temperatures ranging between 10ºC and 21ºC.
What months are the cheapest to book a flight to Jefferson County?
Reserve your ticket in February to enjoy low-priced flights to Jefferson County. The month of December is generally the most expensive time to purchase a fare.

Book with confidence

About Jefferson County

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