As of 2026, the Heathrow Express is not covered by the Eurail Global Pass. While the Eurail Pass covers the vast majority of National Rail services across Great Britain, the Heathrow Express is a private, premium rail operator that does not participate in the scheme. Travelers with a Eurail Pass can, however, use the Elizabeth Line to reach Heathrow Airport; this service is fully included in the pass and stops at the same terminal stations. Additionally, Eurail pass holders often qualify for a discount on the Heathrow Express if they book through specific portals, but it will still require a separate ticket. For those looking for the "fastest" way into London without paying extra, the Elizabeth Line offers a nearly comparable experience at no additional cost for Eurail users.