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$123+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — DEN
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Oshkosh to Denver Intl are usually found in June or July, booked 87 days in advance, depart on a Sunday or Thursday and return on a Thursday

Cheap flight deals from Oshkosh to Denver

Keep the following information in mind while searching for Oshkosh to Denver flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$219
(United Airlines)

One-way from

$123
(Kiwi.com)

Popular in

March

Cheapest in

June

Average price

$274
Provider with most accurate pricing for Appleton Intl-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Appleton Intl-Denver Intl flights.
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From Oshkosh to Denver Intl
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One-way flight from Oshkosh to Denver Intl
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Highest demand for flights based on searches. 16% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 30, 2025.

This United Airlines deal was found by Cheapflights users on 10/30. 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 11/205:31 pmATW - DEN
1 stop6h 44mUnited Airlines
Mon 11/245:29 pmDEN - ATW
Nonstop2h 29mUnited Airlines
Deal found 10/30$219
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Sun 12/217:00 amATW - DEN
1 stop27h 04mMultiple Airlines
Wed 12/2410:37 pmDEN - ATW
1 stop22h 47mMultiple Airlines
Deal found 10/29$225
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/207:00 amATW - DEN
1 stop8h 15mDelta
Thu 11/275:45 amDEN - ATW
1 stop4h 48mDelta
Deal found 10/29$229
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Sat 12/139:39 amATW - DEN
1 stop8h 10mAmerican Airlines
Tue 12/167:49 amDEN - ATW
2 stops10h 20mAmerican Airlines
Deal found 10/30$234
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Sat 12/69:39 amATW - DEN
1 stop8h 10mAmerican Airlines
Tue 12/96:21 amDEN - ATW
2 stops11h 48mAmerican Airlines
Deal found 10/30$238
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Tue 12/232:38 pmATW - DEN
1 stop9h 55mMultiple Airlines
Wed 12/2410:37 pmDEN - ATW
1 stop22h 47mMultiple Airlines
Deal found 10/29$242
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/156:00 amATW - DEN
1 stop22h 58mMultiple Airlines
Fri 12/1910:37 pmDEN - ATW
1 stop17h 01mMultiple Airlines
Deal found 10/29$247
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/195:29 pmATW - DEN
1 stop28h 41mMultiple Airlines
Wed 12/2410:37 pmDEN - ATW
1 stop22h 47mMultiple Airlines
Deal found 10/29$248
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/138:30 amATW - DEN
Nonstop3h 05mUnited Airlines
Sun 11/165:29 pmDEN - ATW
Nonstop2h 29mUnited Airlines
Deal found 10/29$249
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/172:53 pmATW - DEN
1 stop14h 06mMultiple Airlines
Wed 11/196:50 pmDEN - ATW
2 stops25h 41mMultiple Airlines
Deal found 10/28$250
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/126:00 amATW - DEN
1 stop17h 56mMultiple Airlines
Tue 12/1611:59 pmDEN - ATW
1 stop21h 03mMultiple Airlines
Deal found 10/29$253
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 12/123:48 pmATW - DEN
1 stop8h 05mAmerican Airlines
Tue 12/167:49 amDEN - ATW
2 stops10h 20mAmerican Airlines
Deal found 10/30$254

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 October 30, 2025.
Use the filters below to find and compare flights from Oshkosh to Denver that are best for you.

Fly from

Oshkosh

Fly to

Denver

Route

Depart

Return

Price

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Fri 2/13

5:23 pm-10:56 pm

1 stop6h 33m

Denver Intl

Tue 2/17

6:00 am-1:58 pm

1 stop6h 58m

$229

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Sat 12/6

12:20 pm-3:56 pm

1 stop4h 36m

Denver Intl

Tue 12/9

1:16 pm-10:04 pm

1 stop7h 48m

$229

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Tue 2/10

6:45 am-1:35 pm

1 stop7h 50m

Denver Intl

Wed 2/18

6:10 am-11:21 am

1 stop4h 11m

$229

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Sun 12/21

5:23 pm-10:06 pm

1 stop5h 43m

Denver Intl

Mon 12/29

7:45 am-2:33 pm

1 stop5h 48m

$229

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Wed 3/11

3:45 pm-9:37 pm

1 stop6h 52m

Denver Intl

Wed 3/18

6:15 am-2:08 pm

1 stop6h 53m

$229

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Thu 1/22

8:20 am-10:35 am

Nonstop3h 15m

Denver Intl

Sun 1/25

6:00 am-2:09 pm

1 stop7h 09m

$245

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Thu 1/22

8:20 am-10:35 am

Nonstop3h 15m

Denver Intl

Mon 1/26

6:00 am-2:09 pm

1 stop7h 09m

$248

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Thu 11/13

8:30 am-10:35 am

Nonstop3h 05m

Denver Intl

Mon 11/17

6:00 am-1:57 pm

1 stop6h 57m

$259

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Wed 2/11

12:03 pm-4:41 pm

1 stop5h 38m

Denver Intl

Fri 2/20

6:10 am-11:21 am

1 stop4h 11m

$274

AppletonDenver

ATW - DEN

ATWDEN

Appleton Intl

Thu 11/20

7:00 am-2:15 pm

1 stop8h 15m

Denver Intl

Sat 11/29

5:45 am-11:33 am

1 stop4h 48m

$274

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 21 results
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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 October 24, 2025.

The best time to book flights from Oshkosh to Denver is 87 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, February is the cheapest month in which you can book a flight from Oshkosh to Denver (average of $36). Flying from Oshkosh to Denver in January is currently the most expensive (average of $166). 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 October 30, 2025.

It’s typically best to fly out from Oshkosh to Denver in the evening. Doing so could potentially save you 50% 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 October 26, 2025.

Travelers seeking maximum savings on their Oshkosh to Denver flight should consider departing on Tuesday evenings 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 October 30, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines 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
7,998 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,998 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,035 reviews
Delta
7.9
Good
7,998 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Allegiant Air
7.2
Good
694 reviews
Delta
7.9
Good
7,998 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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, 94 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 4h 36m. 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 most reliable airlines from Oshkosh to Denver?

    The top 3 most reliable airlines when flying from Oshkosh to Denver are Southwest (85%), United Airlines (73%) and Frontier (70%).

  • What are the cheapest flights from Oshkosh to Denver?

    The cheapest flight price from Oshkosh to Denver is $81. On average you can expect to pay $553. The most popular route, (Appleton Intl - Denver Intl), can usually be booked for $219.

  • 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, February is the cheapest month in which you can book a flight from Oshkosh to Denver (average of $36). Flying from Oshkosh to Denver in January is currently the most expensive (average of $166). 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
Black Hawk
Westminster
Broomfield
Lakewood
Golden
Winter Park
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Central City
Manitou Springs
Fort Morgan
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker
Sterling

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Alternative routes for Oshkosh to Denver

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$52Average$183FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$98Average$174FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$180Average$389FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$188Average$315FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$207Average$368FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$366FlexibilityNo cancel feeOn-timeN/A

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