Denmark & Iceland Itinerary — One Copenhagen Layover, Two Countries

For travelers coming from the other side of the world, getting to Iceland means connecting somewhere in Europe. If you have to connect anyway — upgrade that layover into a two-to-three-night stay and turn one trip into two countries. The best place to do it is Copenhagen. This guide covers the design that turns a transfer into a second country, the flight connections, and how to split your nights.

The short version — the route as we flew it (turn a layover into a Nordic capital)

Leg	Stay	How
Home → Copenhagen	2 nights	long-haul flight into CPH
Copenhagen → Reykjavik	5 nights	flight, about 3 hours (Icelandair / SAS)
Reykjavik → Copenhagen	1 night (stopover before the flight home)	flight, about 3 hours
Copenhagen → home	—	long-haul flight out of CPH

These two countries pair “the capital of hygge” with “an island where you experience the planet” — polished urban culture on one side; the primal nature of volcanoes, glaciers and aurora on the other — opposite pleasures in a single trip. The key is that Copenhagen is a hub for Iceland flights. You can burn a two-hour connection as dead time in the terminal, or turn it into two nights in a Nordic capital — the density of the trip changes completely. On the way back, an overnight in Copenhagen also spares you a middle-of-the-night transit, which your body will thank you for.

Connection 1: long-haul into Copenhagen — make the layover a destination

Copenhagen is SAS’s home hub, with direct long-haul links and excellent onward connections across the Nordics and the rest of Europe. The city is compact, and two nights get you to its core — the painted facades of Nyhavn, the spiral ramp of the Round Tower, the autumn colors of the Kastellet and, if the season lines up, Tivoli Gardens after dark. The full plan is in the Copenhagen itinerary, the city walk in the towers and fortress walk, and the seasonal amusement park in the Tivoli Gardens guide. Prices are Nordic-high, but the city works on foot and by bicycle, so transport costs stay low. With a Copenhagen Card, the more you pack in, the more it pays for itself.

Connection 2: Copenhagen → Reykjavik — three hours to another world

From Copenhagen to Keflavík International Airport (Reykjavik) takes about three hours on Icelandair or SAS. The moment you step off the plane, the world switches from urban refinement to an island of volcanoes and lava. Iceland is fundamentally a rental-car country — the Blue Lagoon, the Golden Circle, black-sand beaches, the glacier lagoon and, with luck, a full corona of aurora overhead. Five days cover the headline landscapes without strain. The full route is in Iceland in 5 days, aurora tactics in the northern lights guide, and the south coast’s scenery and safety rules in the south coast guide. The bus between the airport and central Reykjavik takes about 45 minutes, though most itineraries pick up the rental car at the airport and set straight off on the loop.

Splitting the nights — “2-5-1” is kind to your body

Our actual split was Copenhagen 2, Iceland 5, Copenhagen 1 (the night before the flight home) — eight nights in all. The verdict: five nights in Iceland is the minimum for the major sights, two nights on the way out is enough for Copenhagen, and the final night earns its keep as insurance. Icelandic weather turns fast, and both the aurora and the south-coast glacier lagoon demand the flexibility to shift plans toward the clear days — with five nights, you can give one or two days to waiting out the weather. Trimming days? Keep Copenhagen to the outbound two nights and make the return stop an airport hotel, or compress Iceland to four nights of Golden Circle plus south coast. Adding days? The full Ring Road loop of the island (+2–3 nights) is the natural next step.

Booking and preparation — in order of deadline

• 1. Flights — the long-haul round trip to Copenhagen plus the intra-European round trip Copenhagen ⇄ Reykjavik. Either ticket the whole journey through, or book the short legs separately on Icelandair (through-ticketing is the safer bet against missed connections)
• 2. Rental car — the key to Iceland. High season books out early; in winter (October–March), 4WD and winter tires are essential
• 3. Entry authorization — both countries are in the Schengen area. Once ETIAS (expected to start during 2026 · €20) launches, advance application will be required. Note the currencies differ: Denmark uses the Danish krone (DKK), Iceland the Icelandic króna (ISK) — and both are thoroughly cashless
• 4. Season design — aurora season runs mid-September to early April. Copenhagen’s foliage peaks in October, and Tivoli opens for its Halloween and Christmas seasons. Late October proved the sweet spot for the best of both countries

Who this pairing suits — and who it does not

It suits: travelers chasing once-in-a-lifetime landscapes (aurora, glaciers), anyone who wants city and raw nature in one trip, and anyone who would rather turn an unavoidable connection into an extra country. It does not suit: travelers for whom price comes first (the Nordics plus Iceland is among Europe’s most expensive pairings), anyone on a short break (you want eight nights minimum), or anyone uncomfortable driving (Iceland assumes a rental car). Bring the flexibility to bend your schedule to the weather and proper wind- and waterproof layers, and the contrast of refinement and primal nature is like nothing else.

What fills up first — start from what is only open in season

These two countries have many places whose opening period itself switches with the season, so it often happens that the season gets decided before the dates do.

• Iceland’s ice caves are November to March only and require a guided tour (no independent access; from around ISK 19,900). Inside the Volcano, meanwhile, runs May to October, so these two cannot be done on the same trip
• The Blue Lagoon is booking-only with dynamic pricing (a real example: around ISK 12,000 per person on the Comfort plan), and in busy seasons some slots sell out weeks ahead. Lock one in the moment the route is fixed (as of July 2026)
• Tivoli Gardens does not run year-round — summer (April to September), the Halloween season and the Christmas season only. If it is the reason you are going, it decides the season of the trip itself. Buying online in advance skips the entry queue
• Rosenborg Castle is timed entry with capped numbers, so booking on the official site is the safe move. The adjoining King’s Garden is free, so any waiting can be spent there

The order, then, is season (ice cave or inside the volcano) → Tivoli’s opening period → the Blue Lagoon slot → hotels. Even whether turning a connection into two nights is worth it changes a great deal with whether Tivoli is open.

Where to go from here

• Denmark at a glance → Denmark Travel Guide (Copenhagen’s towers, fortress and Tivoli Gardens)
• Iceland at a glance → Iceland Travel Guide (the 5-day loop, aurora, south coast)
• Choose your next trip by scenery → Scenic travel destinations