The Phillies are determined to get a deal done with Bryce Harper, but they may have to wait a little longer.

Owner John Middleton was determined to get a deal agreed to Saturday, according to a report from USA Today, but it doesn't look like that will happen.

The #Phillies are in deep and serious negotiations with Bryce Harper. Owner John Middleton doesn’t want to leave Las Vegas without a deal. — Bob Nightengale (@BNightengale) February 24, 2019

Middleton's plane was initially reported to be heading back east, according to NBCS Philly.

John Middleton spent good amount of time in Vegas today but it looks like his plane is headed back East https://t.co/Nq5lgzAoze — John Clark (@JClarkNBCS) February 24, 2019

However, a further report from USA Today said Middleton was still in Las Vegas and there was optimism a deal could get done by Monday.

Philadelphia #Phillies owner John Middleton still in Las Vegas with Bryce Harper negotiations and optimism now is that 10-year deal with Bryce Harper is finalized by Monday afternoon. — Bob Nightengale (@BNightengale) February 24, 2019

ESPN later reported on Sunday that negotations between Philadelphia and Harper could be resolved by Tuesday.

The White Sox and Padres are reportedly still involved in discussions with the All-Star as well.

While all of this is going down, Harper's asking price is becoming more clear. The six-time All-Star is asking for a $350-million to $360-million deal, according to Fancred Sports.

Manny Machado got $300 million from the Padres, but Harper is reportedly telling teams he is worth more money because of his marketability as well as his talent.

Harper asking price is said by some involved teams to be in 350/360M range. The case is that while Harper and Machado may be comparable on field and similar age, Harper has real value off field due to cachet/fame. Some owners concede this tho some claim it’s “hard to quantify” — Jon Heyman (@JonHeyman) February 24, 2019

Fancred Sports noted there is a second team in Las Vegas negotiating with Harper, though it's unclear who that team is.

While Phillies are seen as the favorite (and may well be), team Harper has been negotiating in Vegas with two teams who were there to see Bryce today, “with more to follow” — Jon Heyman (@JonHeyman) February 24, 2019

Update 10:56 p.m. ET Saturday: Now Middleton is on the way back for real, according to Fancred Sports.