What flight searcher should I use?

In My Humble Opinion
1

Let’s say that I want to fly to London, but I live in Bratislava, Slovakia and just 50 km’s (30 miles) away is Vienna, Austria, now since Vienna is a lot more popular, there are probably more flights to London and more cheaper ones, so what site can I use to automatically show me prices for all regional airports in for example a 50km radius, so both flights from Bratislava and Vienna to London? Or at least 50-100kms around London.

Of course I could manually search first Bratislava to London and then Vienna to London and in this scenario it’s fine since there’s just 2 airports, but sometimes you have a lot more close airports to choose from.

2

Google Flights. Tell it you’re leaving from Bratislava. Click the little plus sign and check VIE.

3

Likewise if you have a preference for London airports you can filter those too.
There are flights as low as $29 each way. Granted that might be in an airline where you have to pay extra for a pressurized cabin…