will back to office within half an hour vs will be back to office within half an hour

Some examples from the web:

• Watch every move he makes. I want Hazel Flagg in this office within half an hour!
• He messaged me back within half an hour.
• We should have a match within half an hour, sir.
• Most of these reactions occur within half an hour after administering the contrast medium.
• I hope that we shall leave within half an hour.
• I can call and have somebody come to the house within half an hour.
• Connecticut state troopers set up roadblocks within half an hour.
• I mean, a kid gets lice, everybody knows who it is within half an hour.
• If we don't neutralize the infection, within half an hour he'll be dead.
• occurred within half an hour after the kidnapping,
• If I didn't call in within half an hour, another shooter was sent to follow.
• We get him a new toy and within half an hour it's smashed to bits.
• Within half an hour that Celestial's little pigs will be on their backs with their hooves in the air belching up human remains.
• We get him a new toy and within half an hour it's smashed to bits.
• If everything goes well, we'll get there within half an hour.
• I guarantee you, within half an hour... you'll be on Cloud Nine.
• We went to his office and within half an hour, he'd woken two Cabinet ministers and half of Ml5.
• I'll be back to pick it up in half an hour.
• Now, go back to Major Ross and tell him that Katherine McVitie will be with him in half an hour.
• Normally I'd change, but I've only got half an hour before I need to get back to my dungeon.

Some examples from the web:

• Watch every move he makes. I want Hazel Flagg in this office within half an hour!
• I'll be back to pick it up in half an hour.
• He messaged me back within half an hour.
• We should have a match within half an hour, sir.
• Most of these reactions occur within half an hour after administering the contrast medium.
• I hope that we shall leave within half an hour.
• I can call and have somebody come to the house within half an hour.
• Connecticut state troopers set up roadblocks within half an hour.
• I mean, a kid gets lice, everybody knows who it is within half an hour.
• If we don't neutralize the infection, within half an hour he'll be dead.
• occurred within half an hour after the kidnapping,
• If I didn't call in within half an hour, another shooter was sent to follow.
• We get him a new toy and within half an hour it's smashed to bits.
• Within half an hour that Celestial's little pigs will be on their backs with their hooves in the air belching up human remains.
• We get him a new toy and within half an hour it's smashed to bits.
• If everything goes well, we'll get there within half an hour.
• Your mom will be back in an hour.
• Emma will be back about an hour.
• Me and Alex will be back in an hour.
• Mike will be back with Kitt in under an hour.