PLEASE - If you live within a distance that allows a trainride, then please book a train instead of a plane
Book your ticket to BERN SBB / BERN HAUPTBAHNHOF. You will have better prices if you book it on foreign webpages like "www.bahn.de", "www.oui.sncf" or other national train company pages outside Switzerland. Everything here is just a bit more expensive ;-)
Bern has a tiny airport that is usually very expensive to fly to (Bern Airport). We recommend that you fly to "Basel / Mulhouse" or "Zurich Airport" and from there you can take a train to Bern Hauptbahnhof (in both cases around 75 minutes).
Flixbus is another option to get to Bern.