Flights, hotels & experiences · review
Kiwi.com
Kiwi.com built its business on a routing trick most other search engines will not attempt: combining flights from airlines that have no partnership with each other into one bookable itinerary, often for less than a single-carrier ticket. That is genuinely useful. It is also genuinely riskier than a normal connection, which is why the site sells its own protection on top, and why what happens when a self-transfer goes wrong matters more here than on almost any other booking site.
Last reviewed 24 August 2026 · scored 3.8/5 by our editors
- Founded
- 2012, as Skypicker
- Headquarters
- Brno, Czech Republic
- Core mechanism
- Virtual interlining
- Self-transfer risk
- Covered by add-on
About Kiwi.com
Kiwi.com launched in 2012 out of Brno, Czech Republic, as Skypicker, a fare-alert engine built by two students; it rebranded to Kiwi.com in 2016 once the "virtual interlining" search became the core product rather than a side feature. The company is now backed by growth investor General Atlantic and operates as a straightforward flight-search-and-booking agency rather than a travel supermarket — no hotels bolted on for their own sake, no cruise upsell, no distractions from the routing engine that is the entire point.
The mechanism is what sets it apart. Ordinary search engines only show connections airlines have agreed to sell together. Kiwi.com will instead combine, say, a budget carrier into a city with a long-haul flight out of it on a completely unrelated airline, checking you don't need a visa for the stopover country and pricing the two legs as one trip. According to Kiwi.com's own newsroom, the search engine handles tens of millions of queries and tens of thousands of booked seats every day, at a scale few pure-play OTAs match.
The trade-off is liability. If the two airlines on a self-transfer itinerary do not codeshare, neither one owes you anything if the first flight is delayed and you miss the second — normally that is entirely the traveller's problem. Kiwi.com's answer is the Kiwi.com Guarantee, offered at checkout on itineraries that need it, which is the entire reason to read the rest of this page before assuming a self-transfer fare is simply free money.
How the pricing works
Single-carrier or codeshare fare
The carrier fare plus Kiwi.com's built-in service fee
A normal itinerary on one airline or an alliance. Safer in the ordinary sense: one carrier is liable for the whole journey.
Self-transfer (virtual interlining) fare
Usually the cheapest option on the route
Two or more unrelated airlines stitched into one itinerary. The saving is real; so is the fact that no single airline is responsible if a connection fails.
Kiwi.com Guarantee
An add-on fee shown at checkout, varies by itinerary
Covers rebooking, and hotel or meal costs, if a self-transfer connection breaks. Offered specifically where the itinerary needs it — read what it actually pays out before assuming it is comprehensive.
Bags, seats and other extras
Airline's own price, passed through
Added at booking or later from your Kiwi.com account, generally cheaper added early since most carriers raise the price closer to departure.
The headline fare already includes Kiwi.com's service fee — the company says it does not disclose that fee as a separate line — so compare the total, not the fare, against a single-carrier search before booking.
What works
Routes that simply do not exist elsewhere
Virtual interlining finds itineraries ordinary search engines cannot construct because the airlines involved never agreed to sell them together. For unusual city pairs, that can be the only sensible option.
Genuinely lower fares on the routes it is built for
Combining a low-cost short-haul leg with an unrelated long-haul carrier regularly beats what either airline charges alone on the connecting route, before any add-on protection is factored in.
The Guarantee prices a real risk, not a manufactured one
Rather than pretending self-transfer connections are as safe as a codeshare, Kiwi.com sells specific cover for the exact failure mode its own product creates. That is a more honest structure than most competitors offer.
Automatic check-in on covered itineraries
Kiwi.com will check passengers in and deliver boarding passes for flights on the Guarantee, removing one of the manual steps a self-transfer otherwise leaves entirely to the traveller.
What doesn’t
Miss a connection without the Guarantee, and it is on you
Unrelated airlines share no liability for each other's delays. Skip the add-on to save money on a self-transfer fare and a late first leg can strand you with no one obliged to rebook you.
Refunds skew toward Kiwi.com Credit, not cash
Trustpilot's most repeated complaint is cancellations resolved as travel credit or a partial refund rather than money back, which matters if you are not planning to book with Kiwi.com again.
Re-checking bags at the connection is on you
A self-transfer usually means clearing the first airline's baggage claim and re-checking in with the second, inside whatever layover time the itinerary gave you. Build in margin, especially through unfamiliar airports.
How it scores elsewhere
Aggregate public scores, with the source named. We do not publish individual testimonials — we have no way to verify them.
Trustpilot
rated "Great"; a very large, long-running review base with a recurring refund-as-credit complaint
4.0ReviewKong editorial score
strong for the routing itself, marked down for what happens when a self-transfer goes wrong
3.8
Buy it if
- Travellers on an unusual city pair where no single airline or alliance sells a through fare
- Anyone happy to buy the Guarantee and treat it as the real cost of a self-transfer saving
- Budget trips where the cheapest legal combination of airlines matters more than one ticket number
- Confident self-transfer flyers comfortable clearing immigration and re-checking bags mid-trip
Skip it if
- Anyone connecting through an unfamiliar airport on a tight layover without buying the Guarantee
- Travellers who want a single ticket number and one airline responsible for the whole itinerary
- Anyone who needs a cash refund rather than credit if plans change after booking
Kiwi.com: common questions
What is virtual interlining?
It is combining flights from airlines with no commercial agreement between them into a single bookable trip. Kiwi.com issues two separate tickets behind the scenes and prices them as one itinerary, which is how it finds routes and fares other search engines do not show.
Do I need the Kiwi.com Guarantee?
You need it on any self-transfer itinerary where you would otherwise have no recourse if the first flight runs late. On a single-carrier or codeshare booking the airline already carries that liability, so the add-on matters far less there than on a self-transfer fare between two unrelated carriers.
Why did my refund come back as credit instead of cash?
This is the most common complaint on public review sites. Depending on the fare rules of the airlines involved and how the cancellation happened, Kiwi.com can resolve it with Kiwi.com Credit rather than a refund to your original payment method — check the terms before assuming cash back is guaranteed.
Is Kiwi.com cheaper than booking directly with an airline?
Often, specifically because of virtual interlining and low-cost-carrier combinations a direct airline site cannot offer at all. On routes already served well by a single airline or alliance, the saving shrinks and can disappear once Kiwi.com's built-in service fee is counted against the direct fare.
What happens if I miss a connection I did not insure?
If the two carriers do not codeshare and you declined the Guarantee, rebooking and any resulting costs are yours to arrange and pay for, including a new fare if the original one is not refundable. This is the central trade-off of self-transfer travel and the reason the Guarantee exists as a product at all.
Ready to try Kiwi.com?
Kiwi.com Guarantee covers rebooking and accommodation on protected itineraries · Backed by growth investor General Atlantic since 2019 · 24/7 support, with human agents responding within hours