Booking conflicting flights with two different airlines [closed]

I booked two tickets departing from the same airport:

One ticket with Airline A, departing at 11:00 to Destination X
One ticket with Airline B, departing at 12:00 to Destination Y

Normally I would fly to Destination X, but there is a chance I may need to cancel that and go to Destination Y at the last moment. Could these bookings be a problem? (I am of course not expecting a refund or anything, I just need to have both options at the day of travel).

Separate of this, can I do the following: check-in for flight A, leave my luggage, go through security, change my mind, get out, request to get my luggage out and check-in for flight B?

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Can you book overlapping flights?

"Nested ticketing" or "nesting itineraries," sometimes also called "back-to-back flights," could help you save a ton on flights, but may be a little risky. It works best if you need to book two trips to and from the same destinations (say, going home to visit your family for Thanksgiving and then again for Christmas).

Can you book two separate airlines?

There are two different types of connecting flights. There are those that are included as one route on your ticket and scheduled by the airline or OTA, and then there those which you plan yourself and book separately, known as self-connecting flights.

Will airlines rebook you on another airline?

The good news is that most airlines will rebook you for free on their next flight to your destination as long as the flight has available seats. If there are none available, get ready to put on your most courteous voice. The DOT suggests asking to have your ticket transferred to another airline.

Can I book flights on two different airlines on the same day?

But the answer to the question is no \u2014 it is absolutely not against the law to book two tickets for the same day on the same route.

Why do airlines overbook flights? | CNBC Explains

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