The phrase "already booked through" is correct and usable in written English.
It can be used when indicating that a reservation or appointment has been made in advance, often for travel or accommodations.
Example: "I'm sorry, but the hotel is already booked through the weekend, so we will need to find another place to stay."
Alternatives: "fully reserved until" or "completely booked until".
Mr. Gibbons's company, Ron Gibbons Swimming Pools Inc., of Islip Terrace, N.Y., is already booked through the summer.
Since July, more than 70 people — married couples, college classmates, military history buffs — have hunted Bin Laden at the gun range, with about 100 more already booked through the beginning of October.
April 30th wouldn't have been my first choice, but it was my dream venue, the place where I'd always known I was going to get married — and it was already booked through to October.
With its $2 million worth of technology, Italian leather seating and mohair-lined walls, the private screening room at the Hazelton Hotel in Toronto, which opened last month, is already booked through the Toronto Film Festival (Sept . 6to 15), playing host to five to seven screenings a day.
It's already booked through the 2008 dining season.
The second-largest industry in their community, the Spirit Bear Adventure Lodge employs 45 people (in a community of about 500) and is already booked through to the end of next fall.
But the world's shipyards were already booked solid through 2005 before the latest China boom began, because of the need for new double-hull tankers to replace single-hull vessels, which are being banned for safety and environmental reasons.
I'm already booked up through 2016, man.
Don't trust a good looking random that approaches you on the beach etc trying to sell you something - just politely say no or tell them you have already booked trips through your rep.
Campground Status The two campgrounds taking reservations (877-444-6777 or www.recreation.gov; $20) — the 245-site Moraine Park Campground, in a ponderosa pine forest with Continental Divide views; and the 54-site Aspenglen, bordering the Fall River — are already booked on weekends through July, though there are some openings midweek.
Users have already booked 3 million trips through the company's app since its launch and the company is continuing to expand not just in North America, but in Asia as well.
