I'm looking for a website containing the aircraft type criterion for booking a flight.

Specifically, I wish to book a direct flight from NY to LA on a 777 or an A340 on Wednesday evening, 6/22, and take a day flight (with good wifi) on Monday, 6/27.

I'm using google flights, and all I found so far are 757s and A330s (which requires selecting and displaying the details for each flight).