$129 Cheap United flights Jacksonville (JAX) to Denver (DEN)

View $129 flight on Tue, Sep 23, 2025Opens in a new window

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$129 Cheap United flights Jacksonville (JAX) to Denver (DEN)

Prices were available within the past 7 days and start at $129 for one-way flights and $242 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Aug 16 - Mon, Aug 18
JAX
Jacksonville
DEN
Denver
$242 Roundtrip, found 3 hours ago
$242
Roundtrip
found 3 hours ago
Select United flight, departing Sat, Aug 16 from Jacksonville to Denver, returning Mon, Aug 18, priced at $242 found 3 hours ago
United
Sat, Aug 16 - Mon, Aug 18
JAX
Jacksonville
DEN
Denver
$252 Roundtrip, found 3 hours ago
$252
Roundtrip
found 3 hours ago
Select United flight, departing Sat, Aug 16 from Jacksonville to Denver, returning Mon, Aug 18, priced at $252 found 3 hours ago
United
Mon, Aug 18 - Mon, Aug 25
JAX
Jacksonville
DEN
Denver
$257 Roundtrip, found 1 hour ago
$257
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Aug 18 from Jacksonville to Denver, returning Mon, Aug 25, priced at $257 found 1 hour ago
Flights from Jacksonville (JAX) to Denver (DEN)
Origin airport
Jacksonville Intl.
Destination airport
Denver Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Popular airline
United
Distance
1444 mi
Average flight time
1 hour 39 mins

Frequently asked questions

How much is a United Airlines flight from Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN)?
Landing cheap one-way United Airlines flights from JAX to DEN from $129 on Expedia is a cinch --- just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from $242 for your next adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from JAX to DEN with United Airlines?
United Airlines flights to Denver are often more affordable in the low-season months of January and November. Whether you're searching for a round-trip or one-way ticket, you could find a better deal then.
What is the cheapest time to book flights from Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN) with United Airlines?
Start searching one to three months ahead of your departure date to get cheap fares on United Airlines flights from Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic journeys.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN)?
Jet off on one of United Airlines's 7 direct weekly flights from Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN). To see your choices, enter your dates, destination and origin and hit search. Then apply the "Nonstop" and "Airline" filters.
How long does it take to fly from JAX to DEN with United Airlines?
It takes around 4h to travel nonstop from Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN) with United Airlines.
What is the earliest United Airlines flight from JAX to DEN?
The earliest flight from JAX to DEN with United Airlines departs at 4:20PM UTC-5. You'll touch down at 6:20PM UTC-7. The final United Airlines flight of the day takes off at 4:20PM UTC-5 and arrives at 6:20PM UTC-7. With approximately 20% fewer cancellations for departures before noon, jetting out early is often the smartest option.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Denver?
United Airlines flights from Jacksonville Intl. Airport (JAX) to Denver land at Denver Intl. Airport (DEN). This is the main entry point to this city.
Why fly with United Airlines from JAX to DEN?
A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to jet off from JAX to DEN with United Airlines. Plus, when you sign up to Expedia's free One Key™ program, you can receive OneKeyCash™* on top of any airline loyalty program earnings. It's yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN)?
For the Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN) route, United Airlines typically operates Boeing 737-800 and Boeing 737 MAX 8 planes. Remember that last-minute changes can occur for operational demands, meaning your flight could be on a different aircraft.
Can I change or cancel my United Airlines flight from Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN)?
It's generally possible to reschedule or cancel your flight, although additional fees may apply if your booking was made over 24 hours ago. Want to keep your options open? Use our "Changes included" or "No cancel fee" filter to find flights that won't penalize you if you need to revise your plans. To make changes, go to "Trips," select your flight and click on "Manage Booking" for more details.

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