To save money, instead of buying a roundtrip ticket from Baltimore to Los Angeles on one airline, I bought a roundtrip from Baltimore to Salt Lake City on Delta to connect with a roundtrip ticket from Salt Lake City to LAX on United. Will I need to transfer my luggage myself in Salt Lake City?

Yes, I’m afraid so. Airlines will only “through-check” luggage on separate tickets when both airlines are partners. In this case Delta is part of the Skyteam alliance and United is part of the Star Alliance. You will need to leave the secure area, claim your luggage in Salt Lake City, …

If my airline is on strike and is not able to reaccommodate me on a partner airline, can I purchase my own ticket on another airline and expect the original airline to reimburse me?

There are no provisions guaranteeing you anything in the case of a labor disruption. That being said, airlines will nearly always try to help their passengers. In many instances the automatic response is to book passengers on the next available flight on the same airline and waive the change fees. …