Is it possible to book a whole row for myself? I usually fly F on United because I am big, but not big enough to be considered a “passenger of size”
Frontier has the best schedule for a trip I’m taking. And the price is only $40. I find Frontier seating to be uncomfortable for longer flights because the seats don’t recline. Stretch seating is still cramped if there’s someone in the middle seat, and the price of a stretch seat is higher than another seat. For a little more than the price of one stretch seat I could buy 3 tickets.
I would like to spend $120 to book a whole row for myself and make my own “lie flat seating”. How would I do so?

I saw a woman buy two seats on a flight. I am flying in a couple hours. When I get to the airport, I will make an inquiry.

I did that (flying with service dog) without any issues, by booking two seats, putting my dog's name into the second person's reservation (she even had a passport) and then call CS - but that was back in the good old times when it was still possible to call them.
I`d just book the seats (all three in your name, maybe add "XTRASEAT" as middle name) and then use the chat tool to contact customer service before their IT catches the triple booking.
Check this thread: Purchasing two seats

Since Frontier makes so much ancillary revenue on each ticket, I can imagine them denying the request for multiple seats because you are effectively limiting their ability to capture the ancillary revenue.

Put another way, those two extra seats are worth a lot more than $40 to them because they expect to get about $50 of ancillary revenue from each one. i.e. they should actually sell those extra seats to you at $90 instead of $40.

Obviously, I don't expect them to actually do this. But logic says they should.

So I should book it with ExtraSeat and ExtraSeat2 as the middle name. Or put real names and birthdays as my companions, check them in, then just be no-shows.

I'm interested to hear how this turns out.

I've always been certain that buying extra seats would just end in frustration when someone decides to move from their middle seat to "my" open window or aisle seat, or the flight is oversold so someone decides to put another pax in the "empty" seats I paid for. I'm really eager to hear if this goes smoothly and as expected, without someone trying to take one of the seats (and going full-blown Karen when told no).

The no-show idea might not work if F9 puts someone else in those seats. For example, if the flight is oversold, and there are empty seats due to no-shows, they will put someone else in that seat.

Definitely tell them what you plan to do ahead of time. Don't just buy extra tickets and have them 'no-show.' Not only will they fill those seats if the flight is oversold, there may also be non-revs that are standing by.

No shows is a very bad thing if you want those seats to stay empty.
If the flight is full and there's standby passengers guess what happens? Frontier will happily seat them into the seats you paid for as the occupants didn't show up....
No, the only way to make sure you'll get to use your own private row is to buy those seats and then alert Frontier that you're a COS, need those seats for yourself.
I found the screenshot I took when asking CS last time:





The way airline ticket pricing works these days, what may happen is the price for one seat is $40, and then the second and/or third seat is $55 or whatever - because the cheap fare bucket is sold out and the price goes up to the next fare class in line. Very common for people who book travel for groups or large families.
But no, they do not deny those requests.That'd be a lawsuit and very bad press just waiting to happen.
Airlines are not comparable to Bolt Bus - type transportation where buying multiple seats but occupying just one of them is frowned upon and will get you a seat neighbor anyway.if the bus is full.

Frontier's COS policies explicitly mentions that affected passengers "should book two seats prior to travel", and my experience with booking additional seats for my dog across multiple airlines is that airlines are always happy about people like me who do that because most don't and then there's issues when the flight is full... I`ve had COS sit next to me being reseated there by the CC/GA during the boarding process, occupying most of the empty seat *I* paid for.

Yes, I book my family all the time, and very familiar with how it works. We always split the reservation at whatever point the low bucket goes to 0.

My point was that it's an interesting situation with Frontier, where they derive over half their revenue from ancillary. Ask yourself this -- what would happen if 60 people each book 3 seats on a single flight? Frontier would clearly get less revenue off that flight than if they had 180 passengers. Yes, it's a thought experiment. But taken to the extreme, I think you can see why Frontier would start to think about ways to keep the passengers from booking extra seats.

They'd be happy I think. Flying around with one-third of the passenger load but all tickets sold saves a lot of fuel... Also, they can adjust fees as they like and introduce new ones as they see fit - "want a second&/third seat just for yourself - that'd be an extra $20 'superwide seat' fee"., then waive this fee for CoS and passengers with service animals upon qualification.
Air New Zealand monetizes empty seats already: https://www.airnewzealand.co.nz/buy-...at-at-check-in

Hi -

As does Scoot in Singapore. Might be a better comparison, since they are a LCC (but not an ULCC)