$28 Cheap Flights to Thornton, CO

View $28 flight on Tue, Jun 16, 2026Opens in a new window

Popular airlines to Thornton

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How much is the cheapest flight to Thornton?

Prices were available within the past 7 days and start at $28 for one-way flights and $56 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, May 5 - Wed, May 13
DFW
Dallas
DEN
Denver
$56 Roundtrip, just found
$56
Roundtrip
just found
Select Frontier Airlines flight, departing Tue, May 5 from Dallas to Denver, returning Wed, May 13, priced at $56 just found
American Airlines
Wed, May 13 - Sat, May 16
LAX
Los Angeles
DEN
Denver
$137 Roundtrip, found 1 hour ago
$137
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Wed, May 13 from Los Angeles to Denver, returning Sat, May 16, priced at $137 found 1 hour ago
Delta
Sat, Jun 6 - Wed, Jun 10
LAX
Los Angeles
DEN
Denver
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Delta flight, departing Sat, Jun 6 from Los Angeles to Denver, returning Wed, Jun 10, priced at $137 just found
United
Sat, Jun 6 - Wed, Jun 10
LAX
Los Angeles
DEN
Denver
$137 Roundtrip, just found
$137
Roundtrip
just found
Select United flight, departing Sat, Jun 6 from Los Angeles to Denver, returning Wed, Jun 10, priced at $137 just found
Southwest Airlines
Sat, Jun 6 - Wed, Jun 10
LAX
Los Angeles
DEN
Denver
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Southwest Airlines flight, departing Sat, Jun 6 from Los Angeles to Denver, returning Wed, Jun 10, priced at $137 just found

Alternative airports near Thornton

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

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city center is 31 minutes. Flights from $188
DEN
Denver Intl.
Cheapest
Average driving time to city center31 min
Flights from $188

Frequently asked questions

What month is the cheapest to fly to Thornton?
Schedule your trip for May if you're hoping to get a deal on your fare. It's the cheapest month to fly to Thornton. If possible, avoid traveling during peak periods such as major public holidays or events.
Which US cities have the cheapest flights to Thornton?
Get cheap flights to Thornton from Chicago, Phoenix and Dallas. These cities usually offer the best fares to this popular destination. But remember that stopovers, seasonality and demand will also impact rates, so remain flexible and book when prices are right.
Which US cities fly direct to Thornton?
You can fly to Thornton directly from 164 US cities. To find a nonstop journey, check "Direct flights only" when looking for flights to Thornton on Expedia. Then, compare your choices and pick the best departure from any of these cities:

  • Chicago
  • Phoenix
  • Dallas
  • Las Vegas
  • Salt Lake City

How to find a cheap flight to Thornton?
Book in advance for the best chance of scoring cheap flights to Thornton. Also, consider traveling during off-peak months like December and January. If you leave on a Thursday, you can save 16% on average compared to those departing on a Sunday.* Save time checking every day and track your flight prices using the Expedia app. We'll send you a notification when fares change.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
How to get a cheap last-minute flight to Thornton?
Being flexible about your plans can help you to secure last-minute deals on cheap flights to Thornton. To view all the available options, consider exploring different ticket types, tweaking your Thornton trip dates, leaving from an alternative airport or going with another airline.
How far in advance should I book a flight to Thornton?
Secure your flight to Thornton two to four months ahead if you're taking off from an international destination. For domestic travel, the timeframe is around 28 days in advance. Cheaper tickets and a greater choice of departure dates, schedules and seating options are just some of the awesome benefits of booking early.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which day of the week is the cheapest day to buy a plane ticket to Thornton?
Sundays are generally the best day to book a cheap flight to Thornton, where you can save 8% on average compared to Fridays. If you choose to purchase on a Friday, expect to pay more as this is typically the most expensive day.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which airlines fly to Thornton?
Thornton is connected to 194 airports worldwide through 19 carriers, with Denver Intl. Airport (DEN) as its primary entry point. Select from these major airlines to Thornton when planning your trip:

  • United Airlines
  • American Airlines
  • Delta Air Lines
  • Frontier Airlines

Where do you fly into Thornton?
Thornton's main airport is Denver Intl. Airport (DEN). If you're looking for more nearby options when flying to Thornton, check out Broomfield, CO (BJC-Rocky Mountain Metropolitan), Boulder, CO (WBU-Boulder Municipal) or Centennial Airport (APA). It's also possible to fly to Thornton through Fort Collins, CO (FNL-Fort Collins-Loveland Municipal).
How far is the airport from central Thornton?
If you're jetting into Denver Intl. Airport (DEN), you'll be roughly 16 mi east of the center of Thornton.
Can I save money by booking a Thornton trip package?
Bundle your accommodations and flights and you could save hundreds of dollars. Better yet, you can add extras like tours and car rentals to your Thornton flight and hotel package deal. With Expedia, it's simple to look after all your Thornton travel arrangements in the same place.
Can I change or cancel my flight to Thornton?
It's often possible to cancel or change your flight to Thornton. Many airlines let you cancel flights for free within 24 hours of booking. However, some flights are non-refundable, and airlines may offer you credit for future flights in place of a direct refund. To reserve affordable flights to Thornton with flexible change policies, pick the "Changes included" or "No cancel fee" filters when you search. Want more details? Visit our Customer Service Portal.

*Flight schedules are subject to change.

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Travel information

Destination airport
Denver Intl.
Destination airport IATA code
DEN
Destination city name
Denver
Roundtrip price
$56

Trending flights to Thornton

Prices were available within the past 7 days and start at $28 for one-way flights and $56 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, May 28 - Mon, Jun 1
IAH
Houston
DEN
Denver
$56 Roundtrip, just found
$56
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, May 28 from Houston to Denver, returning Mon, Jun 1, priced at $56 just found

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