Travel with Axel,
get the best price.

Denver → Reykjavik

Dec 21, 2026 · return Dec 27, 2026

DEN → KEF1 adulteconomyRound trip

3 flight options · 3 airlines

Nonstop flights

Mon, Dec 21 – Sun, Dec 27

FI
3:40 pmDEN
7h 25m
Nonstop
6:05 am+1KEF
FI
4:55 pmKEF
8h 5m
Nonstop
6:00 pmDEN

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Sun, Dec 27

United Airlines
4:35 pmDEN
10h 25m
ORD · 1h 30m
10:00 am+1KEF
FI
4:55 pmKEF
8h 5m
Nonstop
6:00 pmDEN

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

British Airways
5:05 pmDEN
13h 45m
LHR · 1h 15m
1:50 pm+1KEF
FI
4:55 pmKEF
8h 5m
Nonstop
6:00 pmDEN

Round-trip total · 1 adult · Taxes included

Make this trip yours

DEN ⇄ KEF

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, FI 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

More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
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.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-21 → 2026-12-27FIFI670 / FI671$875.002026-10-29T01:03:59Z
2026-12-21 → 2026-12-27United Airlines / FIUA675 + UA912 / FI671$937.502026-10-29T01:03:59Z
2026-12-21 → 2026-12-27British Airways / FIBA218 + BA802 / FI671$968.752026-10-29T01:03:59Z

2026-12-21 → 2026-12-27 · $875.00

  • FI FI670: DEN 2026-12-21 15:40:00 → KEF 2026-12-22 06:05:00; nonstop; 445 minutes. Local airport times.
  • FI FI671: KEF 2026-12-27 16:55:00 → DEN 2026-12-27 18:00:00; nonstop; 485 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $937.50

  • United Airlines UA675 / UA912: DEN 2026-12-21 16:35:00 → KEF 2026-12-22 10:00:00; 1 stop(s) via ORD; 625 minutes. Local airport times.
    • UA675: DEN 2026-12-21 16:35:00 → ORD 2026-12-21 20:15:00; layover at ORD: 90 minutes.
    • UA912: ORD 2026-12-21 21:45:00 → KEF 2026-12-22 10:00:00.
  • FI FI671: KEF 2026-12-27 16:55:00 → DEN 2026-12-27 18:00:00; nonstop; 485 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $968.75

  • British Airways BA218 / BA802: DEN 2026-12-21 17:05:00 → KEF 2026-12-22 13:50:00; 1 stop(s) via LHR; 825 minutes. Local airport times.
    • BA218: DEN 2026-12-21 17:05:00 → LHR 2026-12-22 09:15:00; layover at LHR: 75 minutes.
    • BA802: LHR 2026-12-22 10:30:00 → KEF 2026-12-22 13:50:00.
  • FI FI671: KEF 2026-12-27 16:55:00 → DEN 2026-12-27 18:00:00; nonstop; 485 minutes. Local airport times.

More dates for this route