The honest answer to “what’s the best flight search site” is that the people who fly a lot don’t use one — they use two or three, for different jobs, and the recurring threads in r/travel and r/Flights reflect that more than any single recommendation does. We marked this mixed consensus deliberately. There’s a clear rough majority — most experienced searchers start at Google Flights — but credible people send you elsewhere for specific reasons, and the reason almost always comes down to one split: are you searching for a trip you’ve already decided to take, or waiting to be told when somewhere cheap opens up? Those are different problems and different tools solve them.
That’s the lens worth holding before you read a feature list. A search engine that’s fast and flexible wins when you know your dates and destination. A deal-alert service wins when your plans are loose and your real constraint is price. Most of the disagreement in the threads is really people answering different questions and not noticing.
The short version
| Tool | Wins on | What it costs | The complaint that keeps coming up |
|---|---|---|---|
| Google Flights | Speed, the calendar/date grid, flexible-date searching, clean map view | Free | Doesn’t sell tickets itself; some budget carriers and a few OTAs are missing |
| Skyscanner | ”Everywhere” search, broad international/budget-carrier coverage | Free | Redirects to third-party sellers of varying reliability; UI feels busier |
| Kayak | Deep filters, price-prediction tools, hacker fares, bundling | Free | More ads and upsell; price-prediction accuracy is genuinely debated |
| Going | Curated cheap-fare and mistake-fare alerts by email | Free tier + paid (~$49/yr Premium) | Not a live search at all; you wait for deals, you don’t pick the trip |
Google Flights: where most searches start
Google Flights is the default first stop for a reason, and the threads are unusually consistent about it: it’s fast, the date grid and calendar view make finding the cheapest day trivial, the map view is genuinely useful for “somewhere warm under $400,” and the whole thing loads without fighting you. For the core job of I know roughly where and when, show me options quickly, it’s the consensus pick and has been for a while.
The caveats are real and we’ll give them weight. Google Flights doesn’t sell you the ticket — it hands you off to the airline or an online travel agency to book — which is fine until the handoff price doesn’t match. More importantly, its coverage isn’t total: some ultra-low-cost carriers (Southwest most famously, and a rotating cast of budget airlines) don’t show up, so a “cheapest flight” that ignores those carriers isn’t actually the cheapest. Experienced searchers know to cross-check. If you fly Southwest routes, this tool quietly lies to you by omission.
Skyscanner: the everywhere search
Skyscanner’s standout is the feature Google copied less completely: search everywhere from your airport, flexible on dates, and let it surface where you can actually afford to go. It also tends to have broader international and budget-carrier coverage than Google in a lot of regions, which is why travelers outside the US keep recommending it and why it shows up constantly in spontaneous-trip threads.
The recurring gripe is the booking handoff. Skyscanner aggregates third-party sellers, and the quality of those sellers varies — some are airlines, some are reputable OTAs, and some are budget agencies with shaky customer service that people get burned by when a flight changes. The advice that keeps repeating: use Skyscanner to find the fare, then book directly with the airline when the price is close. The interface is also busier than Google’s, which matters less but is a real complaint.
Kayak: for the people who want every filter
Kayak’s pitch is depth. It has the most granular filters in the category — cabin, layover length, specific airlines, baggage, “hacker fares” that stitch two one-way tickets together — plus price-prediction and price-alert tools for people who want to time a purchase. The crowd that wants to engineer a booking rather than just find one tends to land here.
Two honest caveats. Kayak runs heavier on ads and upsell than Google Flights, and the experience feels more commercial as a result. And the price-prediction feature — “wait, prices will drop” versus “buy now” — is openly debated in the threads; some people swear it’s saved them money, others treat airfare prediction as barely better than a coin flip given how volatile pricing is. Use the filters; take the predictions with salt.
Going: not a search engine at all
Going (formerly Scott’s Cheap Flights) is the one that doesn’t belong in the same column as the others, and saying so is the whole point. It isn’t a live search where you pick a trip — it’s a curated alert service that emails you when an unusually cheap fare or a mistake fare appears from your home airports. The model is flexible plans, price-driven: you don’t decide where you’re going, the deal decides for you. For people whose constraint is budget rather than a fixed destination, the recurring “is Going worth it” discussion lands on a consistent answer — yes if you’re flexible and will actually act fast on a deal; no if you have fixed dates and a fixed destination, because then there’s nothing for it to do.
The plain caveats: the free tier is thin, the good international and mistake-fare alerts sit behind the paid plan, and the entire thing is useless if you can’t be spontaneous. You’re paying for someone to watch fares so you don’t have to — which is worth real money to the right traveler and worth nothing to the wrong one.
Where the room is genuinely split
The disagreement that doesn’t resolve isn’t Google-vs-Skyscanner on features. It’s a split about what flight searching even is. One camp treats it as a solvable lookup: know your trip, query the engine, book the cheapest legitimate fare. The other treats it as opportunistic: stay flexible, let alerts and mistake fares dictate the trip, and optimize for price over destination. Those are different relationships with travel, and which one you have decides your tool more than any filter does.
There’s also a smaller, sensible faction that points out the metasearch result is only a starting price — that booking direct with the airline often beats the OTA once you account for change fees and support, even when the headline number is a few dollars higher. That advice is nearly universal among people who’ve been burned once, and none of these search tools change it.
So what should you actually use?
- Know your dates and destination, want the fastest good search? Google Flights — then cross-check budget carriers it might be hiding.
- Spontaneous, “anywhere I can afford,” international? Skyscanner.
- Want deep filters and price-timing tools, and can tolerate the ads? Kayak.
- Flexible plans, budget-driven, will pounce on a deal email? Going — the paid tier, honestly, or skip it.
- Found a fare on any of them? Check the direct airline price before you book through a third party.
That’s not a coronation, and the category genuinely doesn’t have one — these tools mostly aren’t competing for the same job. The one thing close to universal in the threads is the oldest piece of flight-search advice there is: the engine finds the fare, but where (and whether) you book it is a separate decision, and the cheapest-looking number isn’t always the cheapest trip.
Consensus as of late 2023. Prices and coverage shift constantly and budget-carrier inclusion changes without notice — verify fares at the source before booking. The Test Desk takes no affiliate commission and accepts no sponsorship; this is a synthesis of public discussion and official facts, weighted toward frequent-flyer sentiment, with the usual caveat that travel subreddits skew toward enthusiasts and aren’t a representative sample.