Travel with Axel,
get the best price.

Route overview: Denver to Frankfurt (FRA) flight deals

Denver → Frankfurt

Dec 3, 2026 · return Dec 7, 2026

DEN → FRA1 adulteconomyRound trip

8 flight options · 4 airlines

Nonstop flights

Thu, Dec 3 – Mon, Dec 7

United Airlines
3:55 pmDEN
9h 25m
Nonstop
9:20 am+1FRA
United Airlines
11:10 amFRA
10h 30m
Nonstop
1:40 pmDEN

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Dec 3 – Mon, Dec 7

Lufthansa
5:25 pmDEN
9h 30m
Nonstop
10:55 am+1FRA
Lufthansa
1:10 pmFRA
10h 25m
Nonstop
3:35 pmDEN

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Thu, Dec 3 – Mon, Dec 7

FI
3:40 pmDEN
12h 30m
KEF · 1h 20m
12:10 pm+1FRA
United Airlines
11:10 amFRA
10h 30m
Nonstop
1:40 pmDEN

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Dec 3 – Mon, Dec 7

Delta Air Lines
10:46 amDEN
13h 4m
ATL · 1h 37m
7:50 am+1FRA
United Airlines
11:10 amFRA
10h 30m
Nonstop
1:40 pmDEN

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Dec 3 – Mon, Dec 7

United Airlines
9:35 amDEN
12h 40m
DTW · 1h 38m
6:15 am+1FRA
United Airlines
11:10 amFRA
10h 30m
Nonstop
1:40 pmDEN

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Dec 3 – Mon, Dec 7

United Airlines
10:20 amDEN
13h 5m
IAD · 1h 46m
7:25 am+1FRA
United Airlines
11:10 amFRA
10h 30m
Nonstop
1:40 pmDEN

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Dec 3 – Mon, Dec 7

United Airlines
9:50 amDEN
12h 50m
YYZ · 1h 43m
6:40 am+1FRA
United Airlines
11:10 amFRA
10h 30m
Nonstop
1:40 pmDEN

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Dec 3 – Mon, Dec 7

Lufthansa
4:15 pmDEN
12h 45m
MUC · 2h 5m
1:00 pm+1FRA
Lufthansa
1:10 pmFRA
10h 25m
Nonstop
3:35 pmDEN

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

DEN ⇄ FRA

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, United Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeDec 2, 2026 · Return optionsDec 4, 2026 · Return optionsHotels in Frankfurt with Axel
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-03 → 2026-12-07United AirlinesUA182 / UA181Axel-exclusive $910.002026-10-29T01:03:58Z
2026-12-03 → 2026-12-07LufthansaLH447 / LH446Axel-exclusive $920.002026-10-29T01:03:58Z
2026-12-03 → 2026-12-07FI / United AirlinesFI670 + FI520 / UA181Axel-exclusive $770.002026-10-29T01:03:58Z
2026-12-03 → 2026-12-07Delta Air Lines / United AirlinesDL346 + DL14 / UA181Axel-exclusive $870.002026-10-29T01:03:58Z
2026-12-03 → 2026-12-07United AirlinesUA1915 + LH443 / UA181Axel-exclusive $860.002026-10-29T01:03:58Z
2026-12-03 → 2026-12-07United AirlinesUA2087 + UA989 / UA181Axel-exclusive $860.002026-10-29T01:03:58Z
2026-12-03 → 2026-12-07United AirlinesUA1874 + AC840 / UA181Axel-exclusive $860.002026-10-29T01:03:58Z
2026-12-03 → 2026-12-07LufthansaLH481 + LH103 / LH446Axel-exclusive $870.002026-10-29T01:03:58Z

Route overview: Denver to Frankfurt (FRA) flight deals

2026-12-03 → 2026-12-07 · Axel-exclusive $910.00

  • United Airlines UA182: DEN 2026-12-03 15:55:00 → FRA 2026-12-04 09:20:00; nonstop; 565 minutes. Local airport times.
  • United Airlines UA181: FRA 2026-12-07 11:10:00 → DEN 2026-12-07 13:40:00; nonstop; 630 minutes. Local airport times.

2026-12-03 → 2026-12-07 · Axel-exclusive $920.00

  • Lufthansa LH447: DEN 2026-12-03 17:25:00 → FRA 2026-12-04 10:55:00; nonstop; 570 minutes. Local airport times.
  • Lufthansa LH446: FRA 2026-12-07 13:10:00 → DEN 2026-12-07 15:35:00; nonstop; 625 minutes. Local airport times.

2026-12-03 → 2026-12-07 · Axel-exclusive $770.00

  • FI FI670 / FI520: DEN 2026-12-03 15:40:00 → FRA 2026-12-04 12:10:00; 1 stop(s) via KEF; 750 minutes. Local airport times.
    • FI670: DEN 2026-12-03 15:40:00 → KEF 2026-12-04 06:05:00; layover at KEF: 80 minutes.
    • FI520: KEF 2026-12-04 07:25:00 → FRA 2026-12-04 12:10:00.
  • United Airlines UA181: FRA 2026-12-07 11:10:00 → DEN 2026-12-07 13:40:00; nonstop; 630 minutes. Local airport times.

2026-12-03 → 2026-12-07 · Axel-exclusive $870.00

  • Delta Air Lines DL346 / DL14: DEN 2026-12-03 10:46:00 → FRA 2026-12-04 07:50:00; 1 stop(s) via ATL; 784 minutes. Local airport times.
    • DL346: DEN 2026-12-03 10:46:00 → ATL 2026-12-03 15:33:00; layover at ATL: 97 minutes.
    • DL14: ATL 2026-12-03 17:10:00 → FRA 2026-12-04 07:50:00.
  • United Airlines UA181: FRA 2026-12-07 11:10:00 → DEN 2026-12-07 13:40:00; nonstop; 630 minutes. Local airport times.

2026-12-03 → 2026-12-07 · Axel-exclusive $860.00

  • United Airlines UA1915 / LH443: DEN 2026-12-03 09:35:00 → FRA 2026-12-04 06:15:00; 1 stop(s) via DTW; 760 minutes. Local airport times.
    • UA1915: DEN 2026-12-03 09:35:00 → DTW 2026-12-03 14:27:00; layover at DTW: 98 minutes.
    • LH443: DTW 2026-12-03 16:05:00 → FRA 2026-12-04 06:15:00.
  • United Airlines UA181: FRA 2026-12-07 11:10:00 → DEN 2026-12-07 13:40:00; nonstop; 630 minutes. Local airport times.

2026-12-03 → 2026-12-07 · Axel-exclusive $860.00

  • United Airlines UA2087 / UA989: DEN 2026-12-03 10:20:00 → FRA 2026-12-04 07:25:00; 1 stop(s) via IAD; 785 minutes. Local airport times.
    • UA2087: DEN 2026-12-03 10:20:00 → IAD 2026-12-03 15:44:00; layover at IAD: 106 minutes.
    • UA989: IAD 2026-12-03 17:30:00 → FRA 2026-12-04 07:25:00.
  • United Airlines UA181: FRA 2026-12-07 11:10:00 → DEN 2026-12-07 13:40:00; nonstop; 630 minutes. Local airport times.

2026-12-03 → 2026-12-07 · Axel-exclusive $860.00

  • United Airlines UA1874 / AC840: DEN 2026-12-03 09:50:00 → FRA 2026-12-04 06:40:00; 1 stop(s) via YYZ; 770 minutes. Local airport times.
    • UA1874: DEN 2026-12-03 09:50:00 → YYZ 2026-12-03 15:02:00; layover at YYZ: 103 minutes.
    • AC840: YYZ 2026-12-03 16:45:00 → FRA 2026-12-04 06:40:00.
  • United Airlines UA181: FRA 2026-12-07 11:10:00 → DEN 2026-12-07 13:40:00; nonstop; 630 minutes. Local airport times.

2026-12-03 → 2026-12-07 · Axel-exclusive $870.00

  • Lufthansa LH481 / LH103: DEN 2026-12-03 16:15:00 → FRA 2026-12-04 13:00:00; 1 stop(s) via MUC; 765 minutes. Local airport times.
    • LH481: DEN 2026-12-03 16:15:00 → MUC 2026-12-04 09:55:00; layover at MUC: 125 minutes.
    • LH103: MUC 2026-12-04 12:00:00 → FRA 2026-12-04 13:00:00.
  • Lufthansa LH446: FRA 2026-12-07 13:10:00 → DEN 2026-12-07 15:35:00; nonstop; 625 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Denver (DEN) to Frankfurt (FRA) · Dec 3, 2026 · return Dec 7, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Denver to Frankfurt (FRA) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.