HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Denver

$70+ Cheap flights from Oshkosh, WI to Denver (DEN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — DEN
Apr 5 — Apr 121
Sun 4/5
Sun 4/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Oshkosh to Denver with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Oshkosh to Denver Intl are usually found in July or September, booked 88 days in advance, depart on a Sunday or Thursday and return on a Thursday

Cheap flight deals from Oshkosh to Denver

Cheapest flights from Oshkosh to Denver
Explore the most affordable flight options available from Oshkosh to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 6, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/67:30 am
ATW
-
DEN
1 stop8h 45m
Multiple Airlines
Fri 7/107:18 pm
DEN
-
ATW
Nonstop2h 21m
Multiple Airlines
Deal found 3/1$230
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:45 am
ATW
-
DEN
Nonstop2h 46m
United Airlines
Mon 6/15:40 pm
DEN
-
ATW
Nonstop2h 24m
United Airlines
Deal found 3/3$231
This American Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:39 pm
ATW
-
DEN
1 stop4h 58m
American Airlines
Tue 4/711:59 pm
DEN
-
ATW
2 stops9h 28m
American Airlines
Deal found 3/2$234
This Kiwi.com deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/314:57 pm
ATW
-
DEN
Nonstop2h 31m
Allegiant Air
Mon 8/107:39 pm
DEN
-
ATW
Nonstop2h 21m
Allegiant Air
Deal found 3/3$235
This Kiwi.com deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/159:30 am
ATW
-
DEN
1 stop11h 24m
Multiple Airlines
Mon 5/257:34 pm
DEN
-
ATW
Nonstop2h 15m
Multiple Airlines
Deal found 3/2$236
This Cheapflightsfares deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/194:58 pm
ATW
-
DEN
Nonstop2h 41m
Allegiant Air
Mon 6/227:29 pm
DEN
-
ATW
Nonstop2h 15m
Allegiant Air
Deal found 3/4$237
This Kiwi.com deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:35 pm
ATW
-
DEN
Nonstop2h 39m
Allegiant Air
Mon 5/257:34 pm
DEN
-
ATW
Nonstop2h 15m
Allegiant Air
Deal found 3/6$238
This United Airlines deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/113:46 pm
ATW
-
DEN
1 stop7h 24m
United Airlines
Tue 4/145:32 pm
DEN
-
ATW
Nonstop2h 33m
United Airlines
Deal found 3/4$239
This United Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/18:35 am
ATW
-
DEN
Nonstop3h 00m
United Airlines
Tue 4/76:00 am
DEN
-
ATW
1 stop4h 58m
United Airlines
Deal found 3/2$241
This Booking.com deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:35 pm
ATW
-
DEN
Nonstop2h 39m
Allegiant Air
Mon 6/17:34 pm
DEN
-
ATW
Nonstop2h 15m
Allegiant Air
Deal found 3/4$243
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/38:35 am
ATW
-
DEN
Nonstop3h 00m
United Airlines
Sun 5/106:00 am
DEN
-
ATW
1 stop7h 01m
United Airlines
Deal found 3/3$244
This Kiwi.com deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/84:58 pm
ATW
-
DEN
Nonstop2h 41m
Allegiant Air
Mon 6/157:29 pm
DEN
-
ATW
Nonstop2h 15m
Allegiant Air
Deal found 3/3$245

Find flight deals from Oshkosh to Denver

Keep the following information in mind while searching for Oshkosh to Denver flight deals. Data was last updated March 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$231
(United Airlines)

One-way from

$70
(Kiwi.com)

Popular in

March

Cheapest in

July

Average price

$424
Provider with most accurate pricing for Appleton Intl-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Appleton Intl-Denver Intl flights.
Search Deals
From Oshkosh to Denver Intl
Search Deals
One-way flight from Oshkosh to Denver Intl
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Oshkosh to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 6, 2026.
Use the filters below to find and compare flights from Oshkosh to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Wed 4/22

5:30 am-1:32 pm

1 stop9h 02m

Denver Intl

Sun 4/26

6:30 am-11:22 am

1 stop3h 52m

$249

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Tue 4/28

10:30 am-2:51 pm

1 stop5h 21m

Denver Intl

Sat 5/2

5:30 pm-9:01 pm

Nonstop2h 31m

$289

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Tue 5/5

12:05 pm-3:36 pm

1 stop4h 31m

Denver Intl

Thu 5/14

6:00 am-11:51 am

1 stop4h 51m

$299

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Fri 6/12

4:05 pm-7:58 pm

1 stop4h 53m

Denver Intl

Wed 6/17

6:10 am-11:11 am

1 stop4h 01m

$304
Quickest round-trip

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Sat 7/18

8:40 am-10:26 am

Nonstop2h 46m

Denver Intl

Sat 7/25

5:40 pm-9:04 pm

Nonstop2h 24m

$338

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Tue 7/28

2:40 pm-9:59 pm

1 stop8h 19m

Denver Intl

Fri 8/7

5:40 pm-9:04 pm

Nonstop2h 24m

$354

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Thu 5/7

8:35 am-10:35 am

Nonstop3h 00m

Denver Intl

Wed 5/13

5:30 pm-9:01 pm

Nonstop2h 31m

$354

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Fri 4/10

3:46 pm-10:10 pm

1 stop7h 24m

Denver Intl

Sun 4/12

5:32 pm-9:05 pm

Nonstop2h 33m

$364

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Thu 6/11

8:10 pm-12:53 am

1 stop5h 43m

Denver Intl

Sun 6/14

6:00 am-2:05 pm

1 stop7h 05m

$374

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Wed 4/22

10:30 am-4:29 pm

1 stop6h 59m

Denver Intl

Sun 4/26

5:32 pm-9:05 pm

Nonstop2h 33m

$384

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Oshkosh to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Oshkosh with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Oshkosh to Denver

How far ahead should I book a flight from Oshkosh to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Oshkosh to Denver. Price data was last updated on February 27, 2026.

The best time to book flights from Oshkosh to Denver is 88 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Oshkosh to Denver?

Currently, September is the cheapest month in which you can book a flight from Oshkosh to Denver (average of $75). Flying from Oshkosh to Denver in February is currently the most expensive (average of $220). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from OS9 to DEN?

Find hourly flight availability from Oshkosh to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 6, 2026.

It’s typically best to fly out from Oshkosh to Denver in the evening. Doing so could potentially save you 41% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Oshkosh to Denver?

Use this chart to determine the cheapest time to fly round-trip from Oshkosh to Denver. Price data was last updated on February 21, 2026.

Travelers seeking maximum savings on their Oshkosh to Denver flight should consider departing on Saturday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated March 6, 2026.
Get a feel of what it's like to fly with Delta, United Airlines, and Allegiant Air from Oshkosh to Denver by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,271 reviews

Crew

8.5

Food

7.2

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,271 reviews
Delta
7.9
Good
8,271 reviews

Crew

8.5

Food

7.2

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,404 reviews
Delta
7.9
Good
8,271 reviews

Crew

8.5

Food

7.2

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Allegiant Air
7.3
Good
717 reviews
Delta
7.9
Good
8,271 reviews

Crew

8.5

Food

7.2

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,399 reviews
Delta
7.9
Good
8,271 reviews

Crew

8.5

Food

7.2

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Oshkosh to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Denver from Oshkosh?

    For a flight from Oshkosh to Denver, you will be flying into Denver Intl. Denver Intl (DEN) is just 18.5 mi from the center of the city. Denver Intl is the only Denver airport and it handles 0 inbound flights from Oshkosh per day. 6 airlines have flights to Denver Intl from Oshkosh on a regular basis.

  • How popular is this Oshkosh to Denver flight route?

    Within the past month, 64 users have taken a look at flights from Oshkosh to Denver Intl.

  • How long is the flight from Oshkosh to Denver?

    Departing from Oshkosh to Denver will take you 5h 21m. Airlines will cover a distance of 880 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Oshkosh to Denver one-way?

    For one-way options, check prices for Allegiant Air. According to our data, you can fly for as low as $61. Users have also found prices from $89 and $168 on American Airlines and Delta, respectively.

  • What are the cheapest flights from Oshkosh to Denver?

    The cheapest flight price from Oshkosh to Denver is $104. On average you can expect to pay $782. The most popular route, (Appleton Intl - Denver Intl), can usually be booked for $133.

  • Can I find deals for flights from Oshkosh to Denver that include hotel bookings?

    Yes. In addition to deals on Oshkosh to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Oshkosh to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Oshkosh to Denver.

  • Can I find deals for business class flights from Oshkosh to Denver?

    Yes. Cheapflights offers flight deals from Oshkosh to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Oshkosh to Denver?

    Currently, September is the cheapest month in which you can book a flight from Oshkosh to Denver (average of $75). Flying from Oshkosh to Denver in February is currently the most expensive (average of $220). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Thornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Cripple Creek
Winter Park
Central City
Glendale
Manitou Springs
Frisco
Fort Morgan
Brighton
Evergreen

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Oshkosh to Denver

Discover the top 6 airlines that operate flights from Oshkosh to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$66Average$187FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$95Average$169FlexibilityNo cancel feeOn-time88%
DeltaCheapest$138Average$352FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$168Average$360FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$185Average$321FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$204Average$370FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights