It could be a production imposed set of limited flights, or it could well be that the airlines have themselves only scheduled a limited number of flights out of that airport to international destinations.
The only way to tell is to check the online airline guides for that airport at that time of year to see whether it is a lack of flights or a producer imposed restriction. At least, Phil is acknowledging, one way or the other, that the Racers are faced with limited flight choices.
