The most popular airports for Allegiant Air are Knoxville McGhee Tyson, Orlando Sanford Intl, and Las Vegas Harry Reid Intl according to our data. Flights to or from any of these airports should be available via Allegiant Air year-round.
The cheapest domestic Allegiant Air flight is flying Los Angeles to Provo, which is £55. This round-trip flight has 0 stops. For a one-way domestic Allegiant Air flight, the cheapest route is Provo to Phoenix Sky Harbor Intl (0 stops) for £27.
No, there are no Allegiant Air flights from London Heathrow. However, Allegiant Air does fly from Bangor on a weekly basis. You could also fly with American Airlines from London Heathrow as an alternative travel solution.