[Feature] Add filter by individual flight instance

[mhlas7]

I have searched the existing feature requests to make sure this is not a duplicate request.

• Yes

The feature

I would like to filter by an individual instance of a flight. i.e. Show only DL123 On Jan 1, 2026. The user should be allowed to select more than one individual flight. This will be especially useful to view an individual flight route.

Also, if I click on a flight on the map it pops up a modal showing all of the flights between those two airports. If I click on an individual flight instance, it brings up that flight in the "list flights" modal. It would be great to also filter the map to show only that particular flight instance as well.