Google Flights vs Skyscanner vs Momondo — Which Actually Finds the Cheapest Flights

Updated April 2026 | 4 min read

I have booked flights to 20+ countries using every flight search tool that exists. After hundreds of searches comparing the same routes across platforms, I can tell you that no single tool wins every time — but each one has a specific strength that makes it worth using in the right situation.

Google Flights — Best for Research and Flexibility

Google Flights is where I start every search. Not because it always finds the cheapest fare, but because it has the best tools for figuring out when and where to fly. The Explore map lets you enter your departure city with no destination and see prices to everywhere in the world. The date grid shows price variations across an entire month. The price tracking feature sends you alerts when fares drop on routes you are watching.

Google Flights also tags fares as “low,” “typical,” or “high” based on historical data — no other engine does this. A hidden feature: select “1 carry-on” under the Bags filter to see true costs including budget carrier fees that add $30-$60 each way. Where Google Flights falls short: it does not include Southwest Airlines, and it misses some budget carriers like Ryanair and certain Asian low-cost airlines. It also does not aggregate across airlines as aggressively as dedicated metasearch engines, so you can miss creative routing options. But for seeing the big picture of where to go and when, nothing beats it.

Skyscanner — Best for Finding the Absolute Lowest Price

Skyscanner is the tool that consistently finds fares Google Flights misses. It includes budget carriers, obscure airlines, and third-party booking agencies that Google does not index. The “Everywhere” search and “Cheapest Month” features are similar to Google’s but cast a wider net.

Skyscanner’s biggest advantage is its ability to search flexible dates across an entire month and show you the cheapest combination of outbound and return flights. For my New Zealand trip, Skyscanner found a routing through a budget carrier connection that was $340 cheaper than what Google Flights showed for the same dates. That is not unusual — on about 30% of my searches, Skyscanner beats Google by $50-$200.

The downside: Skyscanner includes third-party booking agencies alongside airlines, and some of those agencies have poor customer service if something goes wrong. Always check the agency ratings before booking through an intermediary. When the price difference is small, I book directly with the airline for better protection.

Momondo — Best for Complex and Multi-City Routes

Momondo (owned by Kayak) excels at finding creative routings that other tools miss. Its algorithm is more aggressive about combining airlines and suggesting open-jaw itineraries where you fly into one city and out of another. For my Balkans road trip, Momondo found a fly-into-Split, fly-out-of-Dubrovnik itinerary that was $180 cheaper than round-trip to either city.

Momondo also has a useful price prediction feature that tells you whether to buy now or wait based on historical fare data for your route. It is not always right, but it is more transparent than other tools about showing you price trends.

My Actual Search Process

Step 1: Open Google Flights and search my route with flexible dates. Look at the date grid and calendar view to find the cheapest travel window. Step 2: Take those dates to Skyscanner and compare prices. Check if budget carriers offer something cheaper. Step 3: If the route is complex or multi-city, run it through Momondo for creative routing options. Step 4: Once I find the best fare, book directly with the airline whenever the price difference is under $30.

This three-tool approach takes about 15 minutes and has saved me an average of $150-$250 per international flight compared to just searching one platform.

Other Tools Worth Knowing

Kiwi.com finds the most creative routings of any tool — including self-transfer itineraries where you book two separate tickets. The savings can be huge but the risk is real: if your first flight is delayed and you miss the second, you are on your own. Only use Kiwi’s self-transfer option if you build in a long connection buffer.

ITA Matrix (owned by Google) is the power tool for frequent flyers. It does not sell tickets but lets you search with extremely specific parameters — routing codes, fare classes, alliance preferences. If you know what you are doing, it can find fares that consumer tools miss.

For keeping costs down once you have your flights booked, an Airalo eSIM saves you from roaming charges the moment you land. And for turning flight spending into future free flights, see my points and miles guide for the best credit card strategies.

Affiliate disclosure: This post contains affiliate links at no extra cost to you. SafetyWing, Skyscanner, Airalo, Booking.com, Viator.