What do you use as a booking site, system, or app for your travel, i,e, hotel, car rental, booking flights etc with an emphasis on paying with crypto?

I use Amex travel concierge and once a month I convert crypto into fiat for settling the bill. With one email they arrange everything. The perks are still quite good, not as good as in the ‘00s but still worth the hefty annual fee and the annoyance of having to sell crypto.
For flights, my broker accepts crypto and she is very good with handling the smallest details.

You can pay directly with USDT through Travala (Book Hotels, Flights, Tours & Car Rental with Crypto | Travala) and the new ShopInBit service I referenced.
As Johnny noted, many agencies are on the market but it often seems that a number of them inflate the true flight price. Why should you have to pay nearly double simply because the payment is made in USDT?