In the past couple months a lot of us flew all over the world: Berlin, Istanbul offsite, Devcon, team offsites, …
I found quite the flights/hotels/train bookings experience had some friction (is that budget OK? Let’s check Airbnb, Booking, Expedia, Liligo, … as well) and could be streamlined just like Expensify does for expenses.
It also integrates with Expensify and even has a concierge service for group bookings: https://www.travelperk.com/group-booking/ and seems to have a good dashboard for team budget for People Ops and leads.
Price is free (sales commissions I guess) to 10€/booking for premium service.