There's a food truck handing out free sweets in SF... if you can find it.

United Airlines is parking their food truck around San Francisco and handing out free food to promote their new route from SFO to Munich. United Airlines is parking their food truck around San Francisco and handing out free food to promote their new route from SFO to Munich. Photo: United Airlines Photo: United Airlines Image 1 of / 24 Caption Close There's a food truck handing out free sweets in SF... if you can find it. 1 / 24 Back to Gallery

San Franciscans love their food trucks. When the food is free, that's even better.

United Airlines is hoping to use that love to drum up interest in their new route from San Francisco to Munich.

Through August 13, United's food truck will be parked at one of three locations starting at 11 a.m. every day. You'll be able to find the truck in SoMa along Brannan Street, in the Financial District somewhere on Sansome Street, or in Mission Bay on Mission Bay Boulevard North.

The airline won't announce the food truck's exact location, so you'll have to be on the lookout in those neighborhoods if you're looking for a free bite to eat.

But don't come too hungry, the truck isn't serving up a full menu: They'll be handing out horseshoe almond and apple crumb cakes, to give people a taste of German desserts.

"It's a sweet way to give our customers a little insight into a cool destination, which will hopefully spark their interest to travel there," United spokesperson Maddie King told SFGATE.

San Francisco isn't the only place the airline is treating to free food. United also has a food truck roaming the streets of New York City. The truck there is serving rugelach and black and white cookies to promote a new route from Newark to Tel Aviv. That truck is also serving dulce de leche doughnuts and coconut cream pineapple doughnuts for a flight to Buenos Aires, and even more doughnuts (cherry and "yuzu" lemon zest flavors) celebrating the airline's flights to Tokyo, according to the Chicago Business Journal.

United's new seasonal route between SFO and Munich leaves daily on a Boeing 787 Dreamliner and is the first time the airline has flown nonstop between the two cities.

Read Alix Martichoux's latest stories and send her news tips at amartichoux@sfchronicle.com.