$34 Cheap Flights to Thornton, CO

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How much is the cheapest flight to Thornton?

Prices were available within the past 7 days and start at $34 for one-way flights and $63 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Jun 11 - Tue, Jun 11
LAS
Harry Reid Intl.
DEN
Denver Intl.
$63 Roundtrip, found 1 hour ago
$63
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Jun 11 from Harry Reid Intl. to Denver Intl., returning Tue, Jun 11, priced at $63 found 1 hour ago
United
Wed, Aug 14 - Sat, Aug 17
LAS
Harry Reid Intl.
DEN
Denver Intl.
$117 Roundtrip, just found
$117
Roundtrip
just found
Select United flight, departing Wed, Aug 14 from Harry Reid Intl. to Denver Intl., returning Sat, Aug 17, priced at $117 just found
American Airlines
Tue, Jun 25 - Wed, Jun 26
LAS
Harry Reid Intl.
DEN
Denver Intl.
$160 Roundtrip, found 4 hours ago
$160
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Tue, Jun 25 from Harry Reid Intl. to Denver Intl., returning Wed, Jun 26, priced at $160 found 4 hours ago
Delta
Sat, Aug 31 - Sat, Aug 31
LAS
Harry Reid Intl.
DEN
Denver Intl.
$171 Roundtrip, found 1 day ago
$171
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 31 from Harry Reid Intl. to Denver Intl., returning Sat, Aug 31, priced at $171 found 1 day ago
Delta
Mon, Jul 22 - Fri, Aug 2
DAL
Love Field
DEN
Denver Intl.
$176 Roundtrip, just found
$176
Roundtrip
just found
Select Delta flight, departing Mon, Jul 22 from Love Field to Denver Intl., returning Fri, Aug 2, priced at $176 just found

Find Your Flights to Thornton DEN

Cheap flights to Thornton (DEN)

Get started finding a cheap flight to Thornton on Expedia by either choosing a deal on this page or entering into the search bar your travel dates, origin airport, and whether you want roundtrip or one-way airfare. You can filter for flexibility, number of stops, airline, and departure/arrival times to find the best flight for you.

We recommend using the ‘Flexible Dates’ calendar at the top of the page to see the price of plane tickets on the surrounding dates. This allows you to pick the cheapest days to fly if your trip allows flexibility and score cheap flight deals to Thornton.

Roundtrip prices range from $63 - $176, and one-ways to Thornton start as low as $34.

Be aware that choosing a non-stop flight can sometimes be more expensive while saving you time. And routes with connections may be available at a cheaper rate.

Airlines that fly to Thornton (DEN)

You have several options for which airline you choose to travel with to Thornton. There are 10 airlines flying into DEN: Frontier Airlines, United, American Airlines, Delta, Alaska Airlines. 

Cheap plane tickets may be available from different airlines at different times and with unique terms. It’s best to understand the details of each airline’s offer before judging its value.

For example, if you plan to check a bag or bring a carry-on, check whether the cheap airfare deal includes a baggage allowance. If not, verify whether the baggage fee is higher than the difference of other airline plane ticket deals offering free checked/carry-on baggage in exchange for a slightly higher airfare. 

Additionally, your preferred frequent flyer membership programs may influence your choice of cheap airline. Expedia allows you to enter your membership numbers during checkout to earn points from your airline and Expedia Rewards—all while getting a great deal and planning all your travel in one online platform.

Find the best deals

At Expedia, we source many flight deals from multiple providers, so you can easily find the best deals that are right for you. A great strategy for getting the best deals can be to make sure you book and travel at the optimal times. Airfare to Thornton (DEN) varies throughout the year based on seasonal demand. You’ll see the lowest rates for roundtrips to DEN in June and in June for one-ways.

Cancellation & flexibility

To change or cancel eligible flights, go to ‘My Trips’ and navigate to your itinerary. If you booked within the last 24-hours, you might be able to cancel your flight for free. Learn more about flight changes or cancellations from our customer service portal. Some plane tickets are available with no change fees, which you can filter for during your search.

Frequently asked questions

How do I find cheap flights to Thornton that have flexible change policies?
At Expedia, we’ve been channeling our inner gymnast to deliver you the most flexible airfares around. Simply mark the “No change fee” box directly below the “Flexible change policies” heading to find the best flights to Thornton.
What is the name of the airport in Thornton?
Denver Intl. Airport (DEN) is the major airport in Thornton.
How far is Denver Intl. Airport (DEN) from central Thornton?
The journey between Denver Airport and downtown Thornton is fairly long. You’ll need to travel 25 mi before you can drop your bags at your city hotel.
How can I book the cheapest flight to Thornton?
To increase your odds of scoring the cheapest flight, enter your travel details into the search bar, then filter the results by your preferred airlines, arrival/departure times and number of stops. Also compare the prices of flying out of and into other airports nearby if possible. Timing is a big factor in nabbing a bargain — book domestic flights at least a month out and international flights around six months in advance to save an average of 10%. And when you come across an amazing deal, grab it before it disappears! One of the cheapest flights to Thornton right now is $24, departing Dallas in June. Wherever you’ll be jetting in from, Expedia will help you get to Thornton for the best price possible.
Which day of the week is the best day to buy a plane ticket to Thornton?
Sunday is the best day of the week to buy plane tickets. But there’s more than one way to score a great deal. Searching for tickets and being ready to buy a few weeks ahead of your departure date will also pay off. Research shows that the optimal booking window for cheap plane tickets ranges from 21 days to about 45 days prior to departure. Settled on your travel dates to Thornton months ahead of time? Monitor when carriers first release their tickets as these are often the cheapest fares available. Savings are subject to change and may vary depending on selections made.
What airport is best to fly into Thornton?
A flight to Thornton means coming in to land at DIA airport. Hop off the plane, pick up your luggage and you’ll be 25 mi from the downtown area.
Which airlines fly to Thornton?
From takeoff to arrival, you can look forward to a comfortable onboard experience with United Airlines. One of 18 airlines that connects Thornton with 200 airports across the globe, it operates the greatest number of services between Phoenix and Thornton. Frontier Airlines is another favorite with travelers.
How many nonstop flights are there to Thornton?
Flying to a new place is much more straightforward when there aren’t any stopovers involved. If you’re heading to Thornton, the great news is that there are roughly 6,343 direct flights every week.
Where are the most popular flights to Thornton departing from?
Travelers often set off from Phoenix, Chicago and Dallas airports when going to Thornton.
Do you have any tips for my flight to Thornton?

  • Wherever you’re going, flying can be a pleasant experience if you’re properly prepared. First of all, pack your passport (or a valid ID), travel documents and medications. Next, toss in a little extra in-flight entertainment to while away the hours. The latest bestseller and a tablet filled with your favorite series are good choices. If you want to nap, a neck pillow and headphones are also worth packing.
  • It also pays to check with your airline regarding what you can’t bring on board your flight. Utility knives, razor blades, swords and batons are among the prohibited items. Anything flammable, sharp or explosive is generally not allowed in your carry-on bag. Be sure to pack any sports equipment like baseball bats or tennis rackets only in your checked luggage.

What to wear on a flight:

  • The aisles of a plane aren’t suitable for a fashion parade. Layer up with comfortable, loose-fitting clothing and bring a hoodie since it can get cool in the cabin during long-haul flights. Sneakers or enclosed, flat shoes are the best type of footwear for longer journeys.
  • Consider wearing compression socks or tights to help prevent deep vein thrombosis (DVT). This blood clotting condition can be caused by prolonged periods of sitting, especially on long-haul flights. Performing leg and foot exercises in your seat or walking around the cabin will help improve your circulation.

How can I get a cheap last-minute flight to Thornton?
The key to securing a cheap last-minute flight to Thornton is flexibility. You can score an excellent deal if you’re not tied to specific flight times, airlines and travel dates. Also compare the prices of flying into and out of nearby airports if that’s an option.
Where can I learn more about changing or canceling my flight to Thornton?
Most flights are free to cancel within 24 hours of making the reservation. However, some flights are non-refundable, and you may receive a flight credit from the airline to use for a future booking. For more information, please visit our Customer Service Portal.
Flights to Thornton information
Destination airport
Denver Intl.
Destination airport IATA code
DEN
Destination city name
Denver
Roundtrip price
$62

Trending flights to Thornton

Prices were available within the past 7 days and start at $34 for one-way flights and $63 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Jun 11 - Tue, Jun 11
LAS
Harry Reid Intl.
DEN
Denver Intl.
$63 Roundtrip, found 1 hour ago
$63
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Jun 11 from Harry Reid Intl. to Denver Intl., returning Tue, Jun 11, priced at $63 found 1 hour ago
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