What airlines fly to Denver?

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to Denver from Appleton according to our data. United Airlines is the first choice among our users, with 70% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 7 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

How many flights depart from Appleton to Denver on average per week?

The number of flights available between Appleton and Denver is 4 per week as of September 2026. The most frequent departure day is Mon, with 50% of weekly flights leaving on this day.

What is the cheapest airline that flies from Appleton Intl to Denver Intl?

Allegiant Air and United Airlines are the most popular carriers operating from Appleton Intl to Denver Intl

When did momondo last update prices for flights from Appleton Intl Airport to Denver Intl Airport?

Prices for flights from Appleton Intl Airport to Denver Intl Airport are updated daily.

How many operators does momondo search for flights from Appleton Intl Airport to Denver Intl Airport?

As of September 2026, there are 4 operators available to choose from for flights from Appleton Intl Airport to Denver Intl Airport.

How old do you have to be to fly from Appleton Intl Airport to Denver Intl Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Appleton Intl Airport to Denver Intl Airport.

What documentation or ID do you need to fly to Denver Intl Airport?

The travel and health documents required for your trip to Denver Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Denver Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$66 Cheap Flights from Appleton to Denver in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Appleton to Denver

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Cheap round-trip flights

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5:29 pm - 7:00 pmATW Appleton Intl-DEN Denver Intl

2h 31mnonstop

7:50 pm - 11:07 pmDEN Denver Intl-ATW Appleton Intl

2h 17mnonstop

$198Allegiant Air

Fri, Oct 30 - Mon, Nov 2

5:29 pm - 7:00 pmATW Appleton Intl-DEN Denver Intl

2h 31mnonstop

7:50 pm - 11:07 pmDEN Denver Intl-ATW Appleton Intl

2h 17mnonstop

$205Allegiant Air

Fri, Oct 30 - Mon, Nov 2

5:29 pm - 7:00 pmATW Appleton Intl-DEN Denver Intl

2h 31mnonstop

10:44 pm - 2:47 pmDEN Denver Intl-ATW Appleton Intl

15h 03m1 stop Las Vegas Harry Reid Intl

$234Multiple Airlines

Mon, Nov 2 - Wed, Nov 4

5:29 pm - 7:00 pmATW Appleton Intl-DEN Denver Intl

2h 31mnonstop

7:02 pm - 8:29 pmDEN Denver Intl-ATW Appleton Intl

24h 27m2 stops Orlando Nashville Intl

$239Multiple Airlines

Mon, Nov 2 - Thu, Nov 5

8:30 am - 10:33 amATW Appleton Intl-DEN Denver Intl

3h 03mnonstop

5:25 pm - 8:48 pmDEN Denver Intl-ATW Appleton Intl

2h 23mnonstop

$319United Airlines

Fri, Nov 13 - Wed, Nov 18

8:30 am - 10:33 amATW Appleton Intl-DEN Denver Intl

3h 03mnonstop

5:25 pm - 8:48 pmDEN Denver Intl-ATW Appleton Intl

2h 23mnonstop

$319United Airlines

Wed, Oct 28 - Sat, Oct 31

5:35 pm - 11:44 pmATW Appleton Intl-DEN Denver Intl

7h 09m1 stop Minneapolis St Paul

6:05 am - 11:38 amDEN Denver Intl-ATW Appleton Intl

4h 33m1 stop Minneapolis St Paul

$339Delta

Fri, Oct 30 - Sun, Nov 1

5:35 pm - 11:44 pmATW Appleton Intl-DEN Denver Intl

7h 09m1 stop Minneapolis St Paul

6:05 am - 11:38 amDEN Denver Intl-ATW Appleton Intl

4h 33m1 stop Minneapolis St Paul

$339Delta

Tue, Oct 27 - Wed, Nov 4

6:30 pm - 11:59 pmATW Appleton Intl-DEN Denver Intl

6h 29m1 stop Chicago O'Hare Intl

9:19 am - 6:01 pmDEN Denver Intl-ATW Appleton Intl

7h 42m1 stop Chicago O'Hare Intl

$339American Airlines

Fri, Feb 5 - Sun, Feb 7

11:23 am - 5:20 pmATW Appleton Intl-DEN Denver Intl

6h 57m1 stop Chicago O'Hare Intl

6:11 pm - 12:07 amDEN Denver Intl-ATW Appleton Intl

4h 56m1 stop Chicago O'Hare Intl

$339American Airlines

Fri, Nov 13 - Mon, Nov 16

Cheap last minute flights

Enter your travel dates to find the best prices.

2:36 pm - 9:44 pmATW Appleton Intl-DEN Denver Intl

8h 08m1 stop Chicago O'Hare Intl

5:46 pm - 9:08 pmDEN Denver Intl-ATW Appleton Intl

2h 22mnonstop

$404United Airlines

Tue, Sep 29 - Sat, Oct 3

6:30 am - 3:37 pmATW Appleton Intl-DEN Denver Intl

10h 07m2 stops Nashville Intl Orlando

7:50 pm - 11:07 pmDEN Denver Intl-ATW Appleton Intl

2h 17mnonstop

$408Multiple Airlines

Mon, Sep 28 - Mon, Oct 5

6:30 am - 3:37 pmATW Appleton Intl-DEN Denver Intl

10h 07m2 stops Nashville Intl Orlando

7:50 pm - 11:07 pmDEN Denver Intl-ATW Appleton Intl

2h 17mnonstop

$411Multiple Airlines

Mon, Sep 28 - Mon, Oct 5

6:31 pm - 12:17 amATW Appleton Intl-DEN Denver Intl

6h 46m1 stop Chicago O'Hare Intl

6:01 pm - 12:11 amDEN Denver Intl-ATW Appleton Intl

5h 10m1 stop Chicago O'Hare Intl

$414American Airlines

Mon, Sep 28 - Sat, Oct 3

6:31 pm - 12:17 amATW Appleton Intl-DEN Denver Intl

6h 46m1 stop Chicago O'Hare Intl

12:29 pm - 6:01 pmDEN Denver Intl-ATW Appleton Intl

4h 32m1 stop Chicago O'Hare Intl

$414American Airlines

Tue, Sep 29 - Sat, Oct 3

8:50 am - 10:35 amATW Appleton Intl-DEN Denver Intl

2h 45mnonstop

5:46 pm - 9:08 pmDEN Denver Intl-ATW Appleton Intl

2h 22mnonstop

$420United Airlines

Tue, Sep 29 - Sat, Oct 3

1:27 pm - 2:58 pmATW Appleton Intl-DEN Denver Intl

2h 31mnonstop

7:50 pm - 11:07 pmDEN Denver Intl-ATW Appleton Intl

2h 17mnonstop

$428Allegiant Air

Mon, Sep 28 - Mon, Oct 5

1:27 pm - 2:58 pmATW Appleton Intl-DEN Denver Intl

2h 31mnonstop

7:50 pm - 11:07 pmDEN Denver Intl-ATW Appleton Intl

2h 17mnonstop

$428Allegiant Air

Mon, Sep 28 - Mon, Oct 5

4:19 pm - 8:05 pmATW Appleton Intl-DEN Denver Intl

4h 46m1 stop Minneapolis St Paul

5:45 pm - 11:02 pmDEN Denver Intl-ATW Appleton Intl

4h 17m1 stop Minneapolis St Paul

$449Delta

Sat, Sep 26 - Mon, Sep 28

4:19 pm - 8:05 pmATW Appleton Intl-DEN Denver Intl

4h 46m1 stop Minneapolis St Paul

8:45 am - 3:37 pmDEN Denver Intl-ATW Appleton Intl

5h 52m1 stop Minneapolis St Paul

$509Delta

Sat, Sep 26 - Sat, Oct 3

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Allegiant Air flights from Appleton to Denver

Our best Allegiant Air deals on Appleton to Denver flight tickets

Allegiant Air

Oct 30

ATW5:29 pmAppleton Intl

2h 31m

DEN7:00 pmDenver Intl

Nov 2

DEN7:50 pmDenver Intl

2h 17m

ATW11:07 pmAppleton Intl

$198

Allegiant Air

Oct 30

ATW5:29 pmAppleton Intl

2h 31m

DEN7:00 pmDenver Intl

Nov 2

DEN7:50 pmDenver Intl

2h 17m

ATW11:07 pmAppleton Intl

$205

Allegiant Air

Oct 5

ATW5:29 pmAppleton Intl

2h 31m

DEN7:00 pmDenver Intl

Oct 23

DEN7:50 pmDenver Intl

2h 17m

ATW11:07 pmAppleton Intl

$211

United Airlines flights from Appleton to Denver

Our best United Airlines deals on Appleton to Denver flight tickets

United Airlines

Oct 4

ATW8:50 amAppleton Intl

2h 45m

DEN10:35 amDenver Intl

Oct 11

DEN5:46 pmDenver Intl

2h 22m

ATW9:08 pmAppleton Intl

$339

United Airlines

Oct 3

ATW2:36 pmAppleton Intl

6h 09m

1 stop

DEN7:45 pmDenver Intl

Oct 11

DEN5:46 pmDenver Intl

2h 22m

ATW9:08 pmAppleton Intl

$349

United Airlines

Oct 7

ATW8:50 amAppleton Intl

2h 45m

DEN10:35 amDenver Intl

Oct 11

DEN5:46 pmDenver Intl

2h 22m

ATW9:08 pmAppleton Intl

$359

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Fri 10/30

5:29 pm-7:00 pm

Nonstop2h 31m

Denver Intl

Mon 11/2

7:50 pm-11:07 pm

Nonstop2h 17m

$198

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Fri 10/30

5:29 pm-7:00 pm

Nonstop2h 31m

Denver Intl

Mon 11/2

7:50 pm-11:07 pm

Nonstop2h 17m

$205

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Mon 11/2

5:29 pm-7:00 pm

Nonstop2h 31m

Denver Intl

Wed 11/4

10:44 pm-2:47 pm

1 stop15h 03m

$234

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Mon 11/2

5:29 pm-7:00 pm

Nonstop2h 31m

Denver Intl

Thu 11/5

7:02 pm-8:29 pm

2 stops24h 27m

$239

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Fri 11/13

8:30 am-10:33 am

Nonstop3h 03m

Denver Intl

Wed 11/18

5:25 pm-8:48 pm

Nonstop2h 23m

$319

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Wed 10/28

8:30 am-10:33 am

Nonstop3h 03m

Denver Intl

Sat 10/31

5:25 pm-8:48 pm

Nonstop2h 23m

$319

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Fri 10/30

5:35 pm-11:44 pm

1 stop7h 09m

Denver Intl

Sun 11/1

6:05 am-11:38 am

1 stop4h 33m

$339

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Tue 10/27

5:35 pm-11:44 pm

1 stop7h 09m

Denver Intl

Wed 11/4

6:05 am-11:38 am

1 stop4h 33m

$339

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Fri 2/5

6:30 pm-11:59 pm

1 stop6h 29m

Denver Intl

Sun 2/7

9:19 am-6:01 pm

1 stop7h 42m

$339

AppletonDenver

ATW Appleton Intl - DEN Denver Intl

ATWDEN

Appleton Intl

Fri 11/13

11:23 am-5:20 pm

1 stop6h 57m

Denver Intl

Mon 11/16

6:11 pm-12:07 am

1 stop4h 56m

$339

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Appleton to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the typical price of a round-trip flight between Appleton and Denver?

Prices are currently low for flights on this route.

Typical prices usually range from $222 to $416.
The lowest price recently found on this route was $198.

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Appleton is in September. Flight prices, which tend to average around $297, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in September, then you should wait until June to fly from Appleton, when ticket prices are also cheap, with an average price of $310.

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Monday when prices can be found for as low as $295. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $588.

What is the cheapest time of day to depart on your flight to Denver?

The cheapest time of day to fly to Denver is at noon when flights can be purchased for as low as $162. Flights in the morning are often more expensive with an average ticket price of $445.

What is the cheapest Appleton Intl to Denver Intl flight route?

Fly from Appleton Intl to Denver Intl for the best Appleton Intl - Denver Intl flight prices

How far in advance should I book a flight from Appleton to Denver?

You are more likely to see cheaper flights to Denver from Appleton when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $354 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Appleton for as low as $284 on momondo.

What cabin class options are available on Appleton to Denver flights?

There are 4 cabin classes available to choose from on Appleton to Denver flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Appleton to Denver flights?

No. A direct flight is the cheapest option for a flight between Appleton to Denver.

How have Appleton to Denver flight prices changed over time?

As of September 2026, prices for Appleton to Denver flights are approximately 51% more expensive when compared to flights at the same time last year.

When to book flights from Appleton to Denver

Are you open to changing your travel dates? Check out the ideal times to fly from Appleton to Denver according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Appleton to Denver (ATW to DEN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Appleton to Denver

Best Price Found	$66
Fastest flight time	2h 31m
Direct flights	Mon, Tue, Wed, Fri, Sat and Sun
Airports in Denver	1 airport

The best one-way flight to Denver from Appleton in the past 72 hours is $66. The best round-trip flight deal from Appleton to Denver found on momondo in the last 72 hours is $198.

The fastest flight from Appleton to Denver takes 2h 31m

Direct flights go from Appleton to Denver on Monday, Tuesday, Wednesday, Friday, Saturday and Sunday. The only airline offering direct flights is Allegiant Air.

There is 1 airport in Denver. From Appleton there are direct flights to Denver Intl (DEN).

Search flight deals

Frequently asked questions about flying from Appleton to Denver

How far is Appleton Intl to Denver Intl by plane?
The straight-line distance from Appleton Intl to Denver Intl is 903.7 mi. By plane, this route typically takes 2h 31m.
When did momondo last update prices for flights from Appleton Intl Airport to Denver Intl Airport?
Prices for flights from Appleton Intl Airport to Denver Intl Airport are updated daily.
How many operators does momondo search for flights from Appleton Intl Airport to Denver Intl Airport?
As of September 2026, there are 4 operators available to choose from for flights from Appleton Intl Airport to Denver Intl Airport.
How old do you have to be to fly from Appleton Intl Airport to Denver Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Appleton Intl Airport to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The travel and health documents required for your trip to Denver Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Denver Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Appleton to Denver?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Appleton to Denver is Airbus A319 (57.22% of total bookings). The next most popular plane models are Airbus A320-100/200 (39.00%), Airbus A321neo (0.94%), and Embraer 175 (Enhanced Winglets) (0.81%).
What is the most popular airline from Appleton to Denver?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Appleton to Denver is United Airlines (64% of total bookings). The next most popular airlines are Allegiant Air (23%), Delta (9%), and American Airlines (5%).

Best airlines flying from Appleton to Denver

Compare and see reviews for airlines that fly from Appleton to Denver with momondo

Airline	Rating	Free Cancellation	Price
Allegiant Air	PriceFrom $113	Free Cancellation	Rating 7.3 677 reviews	Search Allegiant Air flights
Delta	PriceFrom $228	Free Cancellation	Rating 7.8 8,594 reviews	Search Delta flights
American Airlines	PriceFrom $229	Free Cancellation	Rating 7.0 12,074 reviews	Search American Airlines flights
United Airlines	PriceFrom $242	Free Cancellation	Rating 7.4 10,233 reviews	Search United Airlines flights

United Airlines Flights From Appleton to Denver
United Airlines is one of the most popular airlines flying from Appleton to Denver, operating 3 flights/week on average for this route. A good United Airlines flight deal for Appleton to Denver starts from $242 round-trip, up to an average price of $390. Our users have rated United Airlines at 7.4/10.
Allegiant Air Flights From Appleton to Denver
Allegiant Air is also a popular choice for this route. Allegiant Air flight deals for Appleton to Denver start from as low as $113 round-trip, depending on your selected dates, with average Allegiant Air deals seen on momondo around $217. Allegiant Air operates 1 flight to Denver from Appleton in an average week. Users have rated it 7.3/10 across 677 reviews.

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Why use momondo?

Why should I use momondo to find a flight deal from Appleton to Denver?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Appleton to Denver for you.

Can I find flights from Appleton to Denver with flexible booking policies on momondo?

Flights from Appleton to Denver with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Appleton to Denver?

momondo helps you find the best flight between Appleton and Denver by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Appleton to Denver right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Appleton to Denver flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Airports servicing Colorado

Alamosa Airport

Aspen Pitkin County Airport

Cortez Montezuma County Airport

Colorado Springs Airport

Durango La Plata County Airport

Vail Eagle County Airport

Grand Junction Regnl Airport

Gunnison Airport

Hayden Yampa Valley Airport

Montrose County Airport

Telluride Airport

Cheap flights from Appleton to Denver from $66

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Appleton to Denver departing on 11/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Allegiant Air flights from Appleton to Denver

Our best Allegiant Air deals on Appleton to Denver flight tickets

United Airlines flights from Appleton to Denver

Our best United Airlines deals on Appleton to Denver flight tickets

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How to get the cheapest flight ticket from Appleton to Denver

What is the typical price of a round-trip flight between Appleton and Denver?

What is the cheapest month to fly to Denver?

What is the cheapest day to depart on your flight to Denver?

What is the cheapest time of day to depart on your flight to Denver?

What is the cheapest Appleton Intl to Denver Intl flight route?

How far in advance should I book a flight from Appleton to Denver?

What cabin class options are available on Appleton to Denver flights?

Can stopping save me money on Appleton to Denver flights?

How have Appleton to Denver flight prices changed over time?

What is the cheapest airline that flies from Appleton Intl to Denver Intl?

What airlines fly to Denver?

How many flights depart from Appleton to Denver on average per week?

When to book flights from Appleton to Denver

Cheap Appleton to Denver (ATW to DEN) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in Denver

Frequently asked questions about flying from Appleton to Denver

Best airlines flying from Appleton to Denver

Compare and see reviews for airlines that fly from Appleton to Denver with momondo

Traveling to a place near Denver?

Why use momondo?

An easier way to manage your Denver trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Colorado

Fly your favorite airline to Denver

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Denver

List of cabin classes available on flights landing in Denver. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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