Kayak vs Skyscanner vs Google Flights: the question is one ticket or two
The short answer
None of the three sells you a ticket — all of them hand you to an airline or an online travel agency to pay — and all three already tell you when a cheap result is two separate tickets rather than one, in their own published help pages. What none of them can tell you is the part that decides how the day ends: whether the airport in the middle can physically be crossed in the time your itinerary leaves you, which at the four US hubs below costs a further 20 to 40 minutes once a bag has to be reclaimed and re-checked, and what the operating airline’s contract owes you when it cannot.
The single most misunderstood fact about all three is in the first row. None of them is a shop. They are indexes, and the company that takes your card is the company that holds your ticket — which is who can reissue it and who cannot.
Whether each flight search engine issues tickets, and what it calls a split-ticket itinerary
Google Flights
Kayak
Skyscanner
Sells you the ticket
No
No
No
Calls a split ticket
“Separate tickets booked together”
“Hacker Fare”
“Self-transfer”
States the consequence itself
Yes
Yes
Yes
Computes whether the connection is achievable
No
No
No
The last row is not a criticism. A search engine reads schedules; walking distances, bag belts and screening queues are not in a schedule.
What each one gets right, in its own words
We came to this page expecting to find three companies quietly selling fragile tickets. That is not what the sources say. Each of them names the structure of what it is showing you and spells out the consequence, and the quotes below are theirs rather than ours.
Google Flights
A search index over airline and agency fares. Google states it works with hundreds of partners — airlines, online travel agencies and aggregators — and hands you to one of them to pay.
Calls a split ticket a “Separate tickets booked together” and says
a virtual interline is a combination of flights from carriers without a codeshare or interline agreement. Also known as self-transfer fares, virtual interlines generally require travelers to collect and recheck baggage during layovers, check into each flight separately, and forego the benefits of communication between airlines
Who holds your ticket
Google's own help page says that when you select a fare "you'll usually be taken to the airline's website or online travel agency to complete the transaction", and that afterwards you "contact the airline or online travel agent to confirm your booking, change it, cancel it or to resolve any issue that may arise". Whoever took the payment is who holds the ticket.
Genuinely good at
The clearest disclosure of the three, and the only one that explains interlining and virtual interlining side by side in its own help pages. Filtering and calendar search are fast enough that it is the reasonable first stop even if you buy elsewhere.
Where it stops
It is an index, not a seller. Nobody at Google is available when the first flight is late, and the help page says so — it sends you to the airline or the agency.
A metasearch site that compares airline and agency prices, including combinations it assembles itself out of two one-way tickets.
Calls a split ticket a “Hacker Fare” and says
When you book a Hacker Fare, you're getting two separate tickets ... Tickets are independent: If one flight is canceled or changed, the other airline isn't obligated to accommodate you on the other ticket
Who holds your ticket
Kayak sends you elsewhere to pay, and its help page tells you to "verify both fares are still available at the displayed price on each airline's website" before you do. If a leg falls through afterwards it says to "contact the provider you used for the first booking", which is that provider and not Kayak.
Genuinely good at
Pairing two one-ways genuinely does beat some round-trip fares, and Kayak automates a comparison that is tedious to do by hand. It also labels the result rather than burying it, and lists the consequences in plain language.
Where it stops
A Hacker Fare is two contracts wearing one price. Kayak states this; what it cannot state is whether the airport in the middle can be crossed in the time the itinerary leaves you.
A metasearch site with the widest agency coverage of the three, including itineraries stitched from two tickets by an agency rather than by an airline.
Calls a split ticket a “Self-transfer” and says
You'll likely have two tickets, each with a separate cancellation or change policy. If anything causes a delay or cancellation of your first flight, you may miss your second flight and have to buy another ticket.
Who holds your ticket
Skyscanner passes you to a travel provider to pay, and says that where a provider offers transfer protection you will have to read that provider's own terms once you reach its site. The protection, where it exists, is the agency's promise and not Skyscanner's.
Genuinely good at
It draws the line in the right place. Skyscanner does not label a same-alliance connection a self-transfer, on the stated grounds that those airlines will move your bags and rebook you — which is exactly the distinction that decides how a bad day ends.
Where it stops
Transfer protection varies by provider and is the provider's promise, so "protected" is a different thing at each one. And a protected rebooking still starts from wherever the missed connection left you.
They know the schedule. They do not know the airport.
A search engine has your arrival time and your departure time, so it can tell you the layover is ninety minutes. What is not in any schedule is the bag belt, the distance between two terminals, or the queue back through screening. On one ticket those mostly do not matter, because the airlines move your bag and hold the connection. On two tickets they are all yours, and they cost real minutes.
Below is that difference, computed the same way our layover guides compute it: the components an airport publishes about itself, added up, with no probability anywhere in it. The only thing that changes between the two columns is whether the itinerary is one ticket or two.
Minutes a one-terminal-apart domestic connection costs on one ticket versus two, at four US hubs
One terminal apart, domestic to domestic, one checked bag, before any delay to the inbound flight. One terminal apart is the mildest terminal change each airport allows, so these are favourable cases. Miami’s difference is smaller than the others because its inter-terminal walkway already leaves the secure area, so a single ticket there is charged for a screening queue that Dallas, Houston and Los Angeles are not.
Don’t trust a default connection time. Verify the actual terminal transfer math for your own layover, with the airport’s own published figures and the working shown:
Knowing it is two tickets does not tell you what anyone owes you
Every label above is about the moment before you pay. None of them helps at the moment that matters, which is standing at a desk in Dallas after the first flight came in late. What you need then is not the label — it is the sentence in the operating airline’s Conditions of Carriage, which 14 CFR § 253.4 makes part of the ticket you bought.
That sentence differs by airline, and at three of the four largest US carriers it says nothing whatsoever about who sold the ticket — which is the opposite of what a passenger is usually told when an agency issued it. One of the four does condition it, and the answer there reverses depending on whether the airline caused the disruption or you did.
See exactly what happens to your refund and rebooking rights when an agency controls your ticket — each carrier’s clause quoted, with the section number and a script to read at the desk.
People say they "booked on Kayak" or "bought it from Skyscanner", and treat a Hacker Fare as a cheap round-trip ticket.
What is actually true
None of the three sells you a ticket. Google Flights, Kayak and Skyscanner are search indexes that hand you to an airline or an online travel agency to pay, and that seller is the one holding your ticket afterwards — which is why calling Kayak about a cancellation reaches the only company in the chain with no ability to reissue anything. A Hacker Fare is not a round trip at all: Kayak's own help page says "when you book a Hacker Fare, you're getting two separate tickets", each with its own confirmation number, and that "if one flight is canceled or changed, the other airline isn't obligated to accommodate you on the other ticket."
Where the confusion comes from
The word "fare" is doing the damage. A fare is a price on a ticket, so "Hacker Fare" reads as one cheap ticket rather than two separate ones, and the label sits under a price in a results list while the explanation sits on a help page a click away. Kayak is explicit once you open it — this is a misreading rather than a concealment.
Every quote above was read off the company’s own help page on the date shown, and each link goes to that page rather than to a summary of it. We have no commercial relationship with any of the three and no affiliate link on this page. The minute figures are computed from the airports’ own published transfer times by the same module behind our layover guides, which shows its working line by line and deliberately publishes no minimum connection time of its own — those are licensed data, and the figures circulating on the open web for a single airport disagree with each other by half an hour. Where our arithmetic is an allowance rather than a citation, it is labelled as one.
FAQ
Choosing between them — common questions
Answers drawn from each company's published help pages, with the source linked above.
Which is better for booking flights, Skyscanner or Kayak?
For finding a price, they overlap enough that the answer is whichever you prefer using — both index airlines and agencies, and neither sells you the ticket. The difference worth caring about is not between the two sites, it is between a result that is one ticket and a result that is two, and both label that. Kayak calls it a Hacker Fare; Skyscanner calls it a self-transfer. If your itinerary carries either label, the second airline owes you nothing when the first one runs late, and that matters more than which site you found it on.
Are there cheaper flights than Kayak shows?
Sometimes, and the cheapest result is usually cheap for a structural reason rather than a secret one. A price that beats everything else is often two separate tickets rather than one, or an agency working on a thin margin, or a fare without a checked bag. None of those is a trick, but they are not comparable to the fare next to them either. The honest comparison adds the bag, and adds what happens if the first flight is late — which on separate tickets is a new ticket bought at the airport at walk-up prices.
Which one is best for multi-city itineraries?
All three will build you a multi-city itinerary and all three will sometimes build it out of separate tickets, because that is often the only way the route prices at all. The question to ask of any multi-city result is whether the whole thing sits on one ticket. On one ticket, a missed connection is the airline's problem and its contract says what it owes you. On separate tickets, each break in the chain is yours, and a delay on leg one can forfeit leg two with no refund.
Does Google Flights book direct with the airline?
Not always, and that is a common misreading. Google's own help page says that selecting a fare will "usually" take you to "the airline's website or online travel agency", and that you may have several agencies to choose from. Booking direct is available and often listed — but it is a choice you make on the results page, not something Google does for you. Whoever takes your payment is who holds your ticket afterwards.
If I book on Kayak and the flight is cancelled, who do I call?
Not Kayak — it never had your ticket. Call whoever took the payment, because that is the only company that can reissue it. Then read the operating airline's Conditions of Carriage, because what the airline owes you after cancelling is decided there and, at three of the four largest US carriers, is not conditioned on who sold the ticket. Our agency ticket custody tool quotes the relevant clause for each carrier.
Is a Hacker Fare or a self-transfer ever worth it?
Yes, with enough slack. The saving is real and the risk is a function of time: a self-transfer with five hours in a single-terminal airport and no checked bag is a mild inconvenience, while the same fare with ninety minutes, a bag and a terminal change is a bet on the inbound flight being punctual. The arithmetic on this page is how you tell those two apart before you pay, rather than at the bag belt.
Before you book
Have an independent agent check the connection first
Found a cheap multi-city or connecting itinerary and unsure about the layover? Our agents work Sabre and Amadeus daily. They can tell you whether what you are looking at is one ticket or two, check the connection against the minimum the carriers themselves file for those terminals, and price a single-ticket alternative where an interline agreement exists. Where one does not, they will say so and build the two tickets with enough slack to survive a late inbound. We are independent, we are not the airline, and we cannot create an agreement between two carriers that do not have one.