What should you do with your house keys while traveling a short time?

I made an aluminum light copy of the key and kept in my wallet. When I travel I keep my keychain at home. I use the spare key when I'm back to open the door and then put it back in my wallet to rest in peace till the next trip. This spare key is also useful in case I lose my keys or I lock myself out. I also keep a spare key with one of my relatives as a last resort when I lose all my copies or in case of emergencies and I need someone to access my place when I am away.

In some cases when I drive to the airport, I take the keychain and keep it in the car and take only the car keys with me.

I leave my car at airport valet parking, and I leave the house key on the key chain that stays in the ignition of the car. You might think that's crazy, but I live over 90 minutes (at 120 km/hr) from the airport, and it's a very determined thief who will go all that way in the hope my house has something good in it. I never worry about losing my house or car key while I'm away and I know no matter what happens, I can get home.

I don't mean the $20/hr jump-out-at-arrivals valet, but rather off-airport shuttle-bus-supported parking where they bring your car to the building after you get off the shuttle. It's only marginally more expensive than other off-airport parking and for me, the convenience is worth it. The key thing is part of that convenience.

I only need two items to get back into my place: proximity fob for the entrance and elevators, and a key for my front door.

When travelling I leave all my other keys at home and just take these two items. My bag has a small zip pocket, and as soon as I leave I put them in there until I return home.

I'm fortunate in that it's cheaper for me to get a taxi to and from the airport than it is to park there, so I don't have any car keys to contend with! :)

If it's a short trip of up to a two or three weeks, I just keep them in the same place I usually keep them, which for me is my pocket.

If it's a trip of at least a month, then I'll consider using hotel room safes, or just leaving them in my luggage. For longer trips like this, I usually make some arrangement anyway with someone back home to water potplants, collect mail and the like, so if I lose my keys it's inconvenient but I won't be locked out.

Personally I'm often using my travels between moving house - it means I'm not paying rent while I'm travelling ;) So it means no keys during that time.

However, for shorter trips - even a weekend away, I'll usually just keep them on me, or in the same pocket in my day pack that I keep padlock keys. That way it's still almost always on me.

Other options I could suggest:

• leave them with a neighbour, or friend - the downside being if you return at midnight, you have to wake them to get the keys
• hide a spare key in a secret place in your garden somewhere - NOT under the doormat or in a flowerpot (it's a cliche now but I still see it happening among my friends), and preferably not near the door.
• if you live in an apartment the last one may be harder, but often there's an apartment garden, or if you have a front desk / concierge, consider asking them if they'll look after it (if you trust them).
• consider a storage unit somewhere at the airport / train station, depending on the convenience and/or cost

I keep one key in my desk at work and carry one key with me. It always goes into one of the pockets in my backpacks and stays put through out the journey. If there aren't too many airport security check points in the trip, I hang it around my neck. Ain't no way it goes missing from there.

A possible solution is to leave them to the relative who will be in charge to feed the cat and to water the plants.

We always leave our house keys with either a neighbor or a family member living nearby, in case of both short and long trips.

The rationale being that :

• They can regularly check the house and take action in case of robberies.
• In case of fires, they can easily open up the house preventing the need for any further damage (breaking doors or windows)
• Check if that item you misplaced is actually back home or not.
• In case of relatively long trips, you could ask them to have your house cleaned and plants watered, etc.

I had always assumed this was the protocol. I am pretty surprised to see that the answers here suggest entirely the opposite.