No, a Eurail Pass does not cover the London Underground (the Tube). Eurail is designed for National Rail services between cities, whereas the Underground is a separate municipal transit system managed by Transport for London (TfL). To ride the Tube in 2026, you must use Contactless payment (debit/credit card or mobile wallet) or an Oyster Card. While your Eurail pass will get you into London via high-speed Eurostar or domestic National Rail trains (like those arriving at Euston or King's Cross), it is not a valid ticket for the yellow gate turnstiles of the Underground. A high-value peer tip: if you are using your Eurail pass to reach London, you can often use it on the Elizabeth Line or London Overground only if the specific segment is operated by a National Rail partner, but for 99% of "inner London" travel, you will need to pay a separate fare via the standard TfL "Pay-As-You-Go" system.