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Flights from Denver to Cologne

Search cheap flights from Denver to Cologne in the next 3 months. Based on Trip.com's latest 7-day data, one-way fares start at US$679, and round-trip tickets start at US$937.

      • DEN 16:05
        17h 15m
        1 stop
        CGN 17:20
        Denver - Cologne | Sun, May 17 | Lufthansa
        CGN 13:05
        33h 15m
        1 stop
        DEN 14:20
        Cologne - Denver | Sun, May 24 | Lufthansa
        US$937 US$1,400
        33% off
        33% off
        US$1,400 US$937
      • DEN 16:05
        12h 20m
        1 stop
        CGN 12:25
        Denver - Cologne | Sun, May 17 | United Airlines
        CGN 13:05
        33h 15m
        1 stop
        DEN 14:20
        Cologne - Denver | Sun, May 24 | Lufthansa
        US$937 US$1,400
        33% off
        33% off
        US$1,400 US$937
      • DEN 16:05
        12h 20m
        1 stop
        CGN 12:25
        Denver - Cologne | Thu, May 14 | Lufthansa
        CGN 08:30
        13h 50m
        1 stop
        DEN 14:20
        Cologne - Denver | Thu, May 21 | Lufthansa
        US$1,022 US$1,400
        27% off
        27% off
        US$1,400 US$1,022
      • DEN 16:05
        17h 35m
        1 stop
        CGN 17:40
        Denver - Cologne | Thu, May 14 | United Airlines
        CGN 13:05
        33h 15m
        1 stop
        DEN 14:20
        Cologne - Denver | Thu, May 21 | Lufthansa
        US$1,077
        23% off
        US$1,400 US$1,077
      • DEN 16:05
        17h 15m
        1 stop
        CGN 17:20
        Denver - Cologne | Mon, May 25 | United Airlines
        CGN 20:10
        26h 10m
        1 stop
        DEN 14:20
        Cologne - Denver | Mon, Jun 1 | Lufthansa
        US$1,121
        20% off
        US$1,400 US$1,121
      • DEN 16:05
        17h 15m
        1 stop
        CGN 17:20
        Denver - Cologne | Tue, Jun 9 | United Airlines
        CGN 08:30
        13h 50m
        1 stop
        DEN 14:20
        Cologne - Denver | Tue, Jun 16 | Lufthansa
        US$1,146
        18% off
        US$1,400 US$1,146
      • DEN 16:05
        17h 15m
        1 stop
        CGN 17:20
        Denver - Cologne | Tue, Jun 2 | United Airlines
        CGN 20:10
        26h 10m
        1 stop
        DEN 14:20
        Cologne - Denver | Tue, Jun 9 | Lufthansa
        US$1,150
        18% off
        US$1,400 US$1,150
      • DEN 16:05
        17h 15m
        1 stop
        CGN 17:20
        Denver - Cologne | Tue, Jun 9 | Lufthansa
        CGN 13:05
        33h 15m
        1 stop
        DEN 14:20
        Cologne - Denver | Tue, Jun 16 | Lufthansa
        US$1,157
        17% off
        US$1,400 US$1,157
      • DEN 16:05
        19h 25m
        1 stop
        CGN 19:30
        Denver - Cologne | Tue, Jun 23 | Lufthansa
        CGN 13:05
        33h 15m
        1 stop
        DEN 14:20
        Cologne - Denver | Sun, Jun 28 | United Airlines
        US$1,160
        17% off
        US$1,400 US$1,160
      • DEN 16:05
        12h 20m
        1 stop
        CGN 12:25
        Denver - Cologne | Sun, Jun 7 | United Airlines
        CGN 13:05
        33h 15m
        1 stop
        DEN 14:20
        Cologne - Denver | Sun, Jun 14 | United Airlines
        US$1,162
        17% off
        US$1,400 US$1,162
      • DEN 13:00
        17h 25m
        1 stop
        CGN 14:00
        Denver - Cologne | Fri, May 15 | Normal Airline
        CGN 15:00
        6h
        Nonstop
        DEN 16:00
        Cologne - Denver | Sun, May 17 | Normal Airline
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      • DEN 16:05
        31h 40m
        1 stop
        CGN 07:45
        Denver - Cologne | Mon, May 18 | United Airlines
        US$679 US$949
        28% off
        28% off
        US$949 US$679
      • DEN 16:05
        17h 15m
        1 stop
        CGN 17:20
        Denver - Cologne | Sun, May 24 | United Airlines
        US$770 US$949
        19% off
        19% off
        US$949 US$770
      • DEN 16:05
        19h 25m
        1 stop
        CGN 19:30
        Denver - Cologne | Mon, May 25 | United Airlines
        US$771 US$949
        19% off
        19% off
        US$949 US$771
      • DEN 16:05
        12h 20m
        1 stop
        CGN 12:25
        Denver - Cologne | Mon, Jun 8 | United Airlines
        US$774
        18% off
        US$949 US$774
      • DEN 16:05
        17h 15m
        1 stop
        CGN 17:20
        Denver - Cologne | Tue, Jun 9 | United Airlines
        US$774
        18% off
        US$949 US$774
      • DEN 16:05
        19h 25m
        1 stop
        CGN 19:30
        Denver - Cologne | Thu, May 14 | United Airlines
        US$774
        18% off
        US$949 US$774
      • DEN 16:05
        17h 15m
        1 stop
        CGN 17:20
        Denver - Cologne | Mon, Jun 1 | Lufthansa
        US$778
        18% off
        US$949 US$778
      • DEN 16:05
        12h 20m
        1 stop
        CGN 12:25
        Denver - Cologne | Tue, May 26 | United Airlines
        US$778
        18% off
        US$949 US$778
      • DEN 16:05
        19h 25m
        1 stop
        CGN 19:30
        Denver - Cologne | Mon, Jun 8 | Lufthansa
        US$785
        17% off
        US$949 US$785
      • DEN 20:25
        27h 20m
        1 stop
        CGN 07:45
        Denver - Cologne | Sun, May 31 | Lufthansa
        US$787
        17% off
        US$949 US$787
      • DEN 13:00
        17h 25m
        1 stop
        CGN 14:00
        Denver - Cologne | Fri, May 15 | Normal Airline
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Displayed flight fares from Denver to Cologne are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Frequently Asked Questions

  • What are the cheapest flights from Denver to Cologne (DEN-CGN)?

    Based on Trip.com data, United Airlines offers one-way fares as low as US$679 on Cheapest nonstop routes (e.g. DEN to CGN on Mon, May 18), while Lufthansa offers Cheapest nonstop round-trips from US$937 departing on Sun, May 17 and returning on Sun, May 24.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Denver to Cologne is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Denver to Cologne, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, May 18, with one-way flights priced at just US$679.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Cologne travel is around January.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Denver to Cologne is October, when demand for travel is lower.
  • After crunching the numbers on our May flight calendar, it's currently cheapest to fly from Denver to Cologne on May 19, 2026 with United Airlines, with prices starting at US$1,121.
  • The time difference between Cologne and Denver is 8h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

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Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.