Cons:
May have extreme layovers or airport transfers.
Itineraries may have multiple self-transfers. (This is where your checked bag isn’t sent all the way to your destination and you need to retrieve it from baggage claim and recheck it during some layovers)
Flight cancellations or delays when flying multiple airlines can severely mess up your travel more than when flying a single airline.
Ticket refunds through a third-party booking site can be tricky. (It took me a year to receive a refund for a round-trip booking to Sydney and Fiji because the flights got canceled)
Google Flights seems to be a nice medium between booking through Kayak and directly through the airline. Tends to offer a good ratio between affordability and ease.
Pros:
Comes with the Google Explore feature.
The Google Explore feature will also show destinations that are a driving distance from airports as possible destinations.
It tends to show more options than Kayak or booking directly through an airline.
Calculates each itinerary’s carbon footprint to allow travelers to pick the route with a smaller footprint.
Has the most expansive destination list out of the booking options.
You can search across a range of dates as large as 6 months to find the cheapest possible flights.
Is able to create multiple itineraries through different airlines to provide one whole itinerary to purchase.
When choosing dates to travel, it will provide you with the cheapest ticket price available on each day when picking.
