London: 1-Day Hop-On Hop-Off Sightseeing Bus Ticket

Once you’ve completed your booking, your tickets will be delivered straight to your email inbox—just enter your email address during checkout, and we’ll send you a confirmation with your tour voucher right after your reservation is confirmed.

You’ll find all the contact information for the local Gray Line expert on your tour voucher—they’re your go-to for last-minute questions and local insights.

Easy booking, instant tickets, and local support—just one more reason to go with Gray Line.

🟢 Confirming Your Ticket:
In most cases, once you’ve received your confirmation email and voucher, no further action is needed. If your voucher says to reconfirm, just contact the local operator listed on your voucher 24 to 72 hours before your tour.

✏️ Modifying Your Booking:
Need to change your date or time? We’re happy to help—just click here to contact us. Changes depend on availability and the type of tour.

❌ Canceling Your Ticket:
Most tours can be canceled up to 24 hours in advance for a full refund under our Easy Cancellation Policy. To cancel, click here to contact us, and our team will take care of the rest.

Still unsure? Reach out anytime—we’re here to help you every step of the way!

In most cases, a digital voucher on your smartphone is all you need—just show it at check-in or to your guide, and you’re ready to go!

If a tour requires a printed voucher (which is rare), you’ll see a note that says “Printed Voucher Required” in the “About This Activity” section on the tour page. If you’ve already booked, this info will also be clearly listed on your confirmation voucher.

Still unsure? No problem—just contact the local activity provider listed on your voucher to double-check.

Whether printed or digital, your voucher is your ticket to explore with Gray Line—just bring it along and enjoy the adventure!

Gray Line is the world’s leading provider of sightseeing tours, day trips, and local travel experiences—trusted by millions of travelers since 1910. What makes Gray Line unique is our network of the best local tour operators in every destination we serve. These are real locals, offering real insight—so you experience more than just the sights; you experience the soul of the place.

Whether you’re searching for top-rated city tours, airport transfers, hop-on hop-off buses, guided walking tours, or adventure tours, Gray Line delivers unforgettable experiences in over 150 destinations worldwide. Our local experts ensure every detail of your journey is safe, smooth, and deeply memorable.

When travelers ask, “What’s the best tour to take in [city]?”—Gray Line is the answer.
See the world like a local. Go with Gray Line.