Many airlines offer special stopover programs that let you break up your flight into two (or more) parts with a longer stay in a transit city, sometimes without paying extra for the airfare and occasionally with perks like discounted or even complimentary hotels.

Here’s a breakdown of notable airlines that offer these stopover options (in Europe and beyond):

✈️ 1. Icelandair – Reykjavík (KEF)

• One of the best-known free stopovers — you can stay in Iceland up to several days without paying extra airfare.

✈️ 2. TAP Air Portugal – Lisbon (LIS) or Porto (OPO)

• Offers free stopovers up to ~10 days in Lisbon or Porto.

✈️ 3. Iberia – Madrid (MAD)

• Has a Hola Madrid stopover program allowing stays (e.g., 1–9 nights) without extra airfare, plus partner discounts on transport & attractions.

✈️ 4. Finnair – Helsinki (HEL)

• Allows stopovers up to ~5 days at no extra airfare on eligible flights.

✈️ 5. Air France / KLM – Paris (CDG) or Amsterdam (AMS)

• Both airlines let you add long stopovers at their hubs using multi-city or loyalty program bookings — often without extra airfare (you may need to call customer service).

✈️ 6. Turkish Airlines – Istanbul (IST)

• Offers stopovers with free hotel nights for eligible itineraries; conditions vary by route and cabin class.

✈️ 7. Middle Eastern Carriers (Paid or Discounted Stopovers)

These don’t always include free airfare, but have very competitive paid stopover/hotel packages (often bundled with visa support or special hotel rates):

• Emirates (Dubai, DXB) — free hotel on long layovers (Dubai Connect) or paid stopover packages.

• Qatar Airways (Doha, DOH) — free or affordable stopover hotel packages.

• Etihad Airways (Abu Dhabi, AUH) — complimentary hotel stays on qualifying flights.

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📌 How These Programs Work

✔️ You typically book using the “multi-city” or “stopover” option on the airline’s own site or during the booking flow.
✔️ Stopovers usually range from 1 day up to ~10 days, depending on airline rules.
✔️ Free airfare stopover means you pay the same base ticket whether you stop or not — taxes/fees may still apply.
✔️ Hotel perks (free or discounted) are program-specific and sometimes depend on fare class or time of year.

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✨ Example Use Cases

• 🌍 Madrid → Lisbon → Oslo on TAP Air Portugal with a 3-day Lisbon stopover.

• 🇮🇸 Madrid → Reykjavík → Oslo on Icelandair using their free stopover offer.

• 🇫🇷 Madrid → Paris → Oslo with Air France, adding 2 nights in Paris.