$27 Cheap Flights to Thornton , CO

Bundle Your Flight + Hotel & Save!

Featured airlines

Top nine airline logos for desktop

How much is the cheapest flight to Thornton?

Prices were available within the past 7 days and start at $27 for one-way flights and $45 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Frontier Airlines
Frontier Airlines
Spirit Airlines
Frontier Airlines
Key Lime Air
Spirit Airlines
Key Lime Air

Reviews from verified customers

Aug 20, 2018

Baggage was slow!

A verified traveler
Phoenix to Denver · Frontier Airlines

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 $45 - $198, and one-ways to Thornton start as low as $27.

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: Spirit Airlines, Frontier Airlines, Delta, Key Lime Air. 

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 January and in December 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

Where can I learn more about changing or canceling my flight to Thornton?
For more information about updating your flight to Thornton or canceling it, head over to our Customer Service Portal.
How do I find cheap flights to Thornton that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight you select. When you’re searching for flights to Thornton, you’ll see a “no change fees” filter for you to select.
Can I fly to Thornton now?
Make your visit to Thornton straightforward and simple by making your first stopover our Covid-19 Travel Advisor. This is the easiest way to stay informed about current travel restrictions, including quarantine requirements and the latest health advisory information.
What is the name of Thornton's airport?
Thornton has only one airport, Denver Intl. Airport (DEN).
How far is DEN from central Thornton?
DIA airport is 15 mi from central Thornton, so you’ll have a reasonable commute into the center of the city.
What airport is best to fly into Thornton?
DEN is the only major airport in Thornton. Before you jet off, it’s a good idea to know a thing or two about it. The terminal sits 15 mi from the center of town.
How many airlines fly to Thornton?
Thornton is serviced by 19 airlines from at least 193 airports across the globe.
Which airlines fly to Thornton?
United Airlines, Southwest Airlines and American Airlines fly the most frequently to Thornton. The majority of flights arrive here from Chicago, with United Airlines having the most services on this route.
How many nonstop flights are there to Thornton?
Planning an unforgettable Thornton getaway is simple when there are 5,799 nonstop flights each week to pick from.
Where are the most popular flights to Thornton departing from?
Travelers often depart from Chicago, Phoenix and Las Vegas airports when flying to Thornton.
How long is the flight to Thornton Airport?
If you’re going to Thornton from Chicago, you’re looking at a flight time of 2 hours and 43 minutes. Those setting off from Phoenix can expect to be airborne for 1 hour and 49 minutes. From Las Vegas it’s approximately 1 hour and 55 minutes away.
How to book the cheapest flight to Thornton?
If you’d like to have some extra spending money on your trip to Thornton, then listen up! As every seasoned jet-setter knows, avoid booking at the last minute. Prices are usually highest just prior to the departure date. Don’t stop there, however. Do some research and find out if there are a couple of airports at your destination. Fares often differ depending on the airport you use. Remember to compare prices across air carriers too. Last but not least, be ready to book quickly if you find a great price. It might not stick around for long! With a bit of know-how and a little good fortune, the perfect fare will be yours.
How to survive the flight to Thornton?
If you’re not prepared, airports and flying can be a real challenge. But don’t hit the panic button just yet. Follow these tips and tricks for a hassle-free start to your time in Thornton.What to pack in your hand luggage:

  • First of all, pack in your passport, travel docs, wallet and vital medications. Next, you’ll want some entertainment to while away the hours. A juicy novel and a phone filled with your favorite movies are good options. If you hope to catch up on some sleep, a comfy neck pillow and a pair of earplugs will also be useful. Finally, squeeze in a few toiletry items to ensure you step off the plane looking fresh and raring to go.

Do not pack the following items in your hand luggage:

  • Make sure you don’t have a sharp object hiding in one of the compartments of your carry-on luggage. Other restricted items include explosive or flammable substances, such as aerosol cans and bleach, and gels and liquids in containers with a volume of more than 3.4 ounces (100 milliliters).

What to wear on a flight:

  • The answer to a comfortable flight often lies in your choice of clothes. Prepare for temperature changes by layering up. This will keep you nice and warm if the cabin gets too cold. Shoes like sandals and heels are best left in your checked suitcase. Instead, opt for flat, closed-toed footwear like slip-ons. Your feet will thank you for it.
  • Unfortunately, a risk of flying long-haul is developing deep vein thrombosis (DVT), a blood clotting condition caused by extended periods of inactivity. To avoid this, make the most of every opportunity to stretch your legs and walk around the cabin. Compression socks and tights are another simple way to help reduce this risk.

How to get through airport security fast when flying to Thornton?
Being prepared before you get to the airport will help make your trip to Thornton a pleasure. Below are some handy tips for a speedy journey through security:

  • Security personnel first need to know that you have a valid passport and matching travel documents before anything else. Have them ready for inspection.
  • Time to strip down. Well kind of. Your coat, belt, keys and other small items, like your earphones, will be required to go through the X-ray machine. Make the whole process faster by removing them as it gets closer to your turn.
  • All your electronic gadgets, including your phone and tablet, will also need to be separately scanned.
  • Want to bring along your favorite hand cream? Not a problem. As long as it’s in a container no larger than 3.4 ounces (100 milliliters) and it’s stored in a clear zip-lock bag, you’re allowed to bring it with you in your carry-on luggage.
  • The right choice of footwear can save you several valuable minutes. Boots are often required to be removed and X-rayed separately. Slip-on sneakers usually aren’t.
  • Avoid taking prohibited items in your carry-on bag. If you have any sharp or pointed objects, pack them safely away in your checked baggage. They won’t be allowed on board.

Flights to Thornton information
Destination AirportDenver Intl.
Destination Airport IATA CodeDEN
Destination City NameDenver
Flight Price$53

Trending flights to Thornton

Prices were available within the past 7 days and start at $27 for one-way flights and $45 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Spirit Airlines