Yes, there is a Post Office at Heathrow, but only in two of the four terminals: inside WHSmith in Terminal 3 Departures (landside, next to Pret A Manger) and inside WHSmith in Terminal 5 Landside Departures (next to the South Wing). There is no standalone Post Office branch in Terminal 2 or Terminal 4. Both branches currently show opening hours of 09:00 to 17:00, every day of the week, on the official Post Office branch finder. Checked against heathrow.com and the Post Office branch finder, 2026.
Which Heathrow Terminals Have a Post Office
Heathrow's own site confirms the airport Post Office operates from two locations, both run as a counter inside a WHSmith store rather than a standalone branch:
| Terminal | Location | Address |
|---|---|---|
| Terminal 3 | Departures, landside, next to Pret A Manger, inside WHSmith | Terminal 3, London Heathrow Airport, Hounslow, TW6 1QG |
| Terminal 5 | Landside Departures, next to the South Wing, inside WHSmith | Terminal 5, London Heathrow Airport, Hounslow, TW6 2GA |
Terminal 2 and Terminal 4 do not have a Post Office counter. If you're departing from either of those terminals and need Post Office services, you'd need to use the Terminal 3 or Terminal 5 branch before you fly, or a Post Office branch outside the airport before you travel.
Both branches are landside, meaning you can reach them without going through security, which matters if you need to post something before you fly rather than after.
What You Can Do at the Heathrow Post Office
The Post Office branches at Heathrow carry standard Post Office counter services, including:
- Royal Mail and Parcelforce Worldwide postage, including Drop & Go and Parcelforce Express 48 Large
- Everyday personal and business banking: cash withdrawals, cash deposits and cheque deposits
- Bill payments and other standard Post Office counter services
Because these are full Post Office counters rather than a postbox or a stamp machine, they're the right place at Heathrow to post a parcel, not just a letter.
Post Boxes: Before and After Security
Separately from the Post Office counters, Heathrow has standard Royal Mail post boxes in each terminal, both before and after security. These are for letters and postcards only. You cannot post parcels using the post boxes, and anything posted may be inspected by HM Customs before it leaves the country.
This means you don't need to reach Terminal 3 or Terminal 5 just to post a letter or postcard: a post box in your own terminal will do, whichever side of security you're on when you want to post it. A parcel still needs the Post Office counter at T3 or T5.
Buying Stamps at Heathrow
If you just need stamps rather than a full Post Office visit, Heathrow's WHSmith branches in the terminals sell them at the till, and there are also coin-operated stamp machines in each terminal for when a WHSmith queue or opening time doesn't suit.
MailandFly: Posting Items You Can't Take Through Security
Heathrow also runs a separate service called MailandFly, located at security, for items that would otherwise be confiscated as prohibited (for example, oversized liquids or certain blades). Rather than losing the item, you can choose to have it placed into the MailandFly collection container instead of disposed of. You're given a unique tracking code to register online and reclaim the item later. Fees apply only if you want the item posted back to you - postage and packing costs depend on size, weight and destination - and you typically have six weeks to claim, with items usually arriving within about three days of being requested. MailandFly at Heathrow is operated by Smarte Carte; check its specific terms at the point of use, since fees and claim windows can be adjusted by the operator.
Post Office Opening Hours at Heathrow
The current listing on the official Post Office branch finder shows both the Terminal 3 and Terminal 5 Heathrow branches open 09:00 to 17:00, Monday to Sunday. Airport branch hours can change with staffing and footfall, so if your visit is time-critical, check the Post Office branch finder for the specific branch shortly before you travel rather than relying on a fixed hours table.
Heathrow Post Office at a Glance
| Terminal 3 | Terminal 5 | Terminal 2 | Terminal 4 | |
|---|---|---|---|---|
| Post Office counter | Yes, inside WHSmith | Yes, inside WHSmith | No | No |
| Post boxes (letters only) | Yes, before and after security | Yes, before and after security | Yes, before and after security | Yes, before and after security |
| Stamps | WHSmith till and coin machine | WHSmith till and coin machine | Coin machine | Coin machine |
| MailandFly | At security | At security | At security | At security |