Airlines bookable on United.com
 

What airlines besides United and Star Alliance partners are bookable on United.com?

Depending on the route, I think you could potentially see almost anything.

Depends on route.

Earlier versions of ual.com let you choose just about any airline. Then it was paired down to only star airlines. Now, just united – and less it happens to show something else depending on the routing.

Airlines bookable on United.com
 

Huh? This statement makes no sense. Either it's 'just United' or others, too. Can't be both.

I've seen UA show lots of others - including codeshares operated by *partners, *partners on their own flight numbers, and completely OAL. Personally, I've seen many including AC, LH, NH, TG, SQ (though not for awards now), ET, LX, TK, SAS, TAP, AI, CX, EI & 9W. US also, but that was prior to them leaving *, though I think someone reported seeing a US flight even after that. Likewise, I think someone mentioned booking spent hong with an AS segment once.

Are you looking to book JUST a non-UA/*A flight without other segments.
Even if you can (not sure of it) I don't believe it would come out to be very cheap. Nor would you get any elite status benefits.

As others mentioned it depends on the route. Looking in Oz you'll see JetStar or Qantas connections show up, also with HKG you'll see CX connections but it's usually always $$$$ in a full fare fare class.

Ditto. In the US (where 99% of my flying is) I've only ever seen UA/UAEX/Silver offered... Booking a trip to Australia I saw a lot of *A options and at one point the site was offering Qantas and/or Virgin Australia segments after I deselected the *A Partners option in the search criteria (I think one search I managed to get it to spit out a QF->VA->UA->UA option that made no practical sense whatsoever but a fraction of the more logical UA-only fare)

Not always high pricing. Depends on the carrier, their restrictions and route.

Some carriers, notably Asian carriers like SQ and TG and Eva, along with NZ (at least up until now, maybe not anymore with the JV), typically have plating restrictions on all but full fare, meaning anything sold on UA.com will be high. Others, including those with SAS, LH, AC, NH segments will often have discount fares - often the same or less as all-UA itineraries.

As an example, when I look up CVG-YYZ, I see UA codeshares operated by AC, often at the same or slightly lower prices then the UA connections. Look up intra-EU flights, like LHR-CPH on SAS, or YYZ - YUL, which will bring up AC options (both non-codeshares) and you'll still get discount prices. And while looking up a fare to CGK last year, among the cheapest options for return most days were CGK-HKG on CX connecting to UA on HKG-US hub to my origin. I ended up choosing the NH-UA connections, but pricing was about the same - within $10 or so.

Benefits are based on operating carrier and fare class for accrual. So of course, if it's a non-partner, no benefits. However, for * partners, you'd get the same benefits as you always would with that partner.

I was asking if the OP however was looking to book a flight through UA.com that has no UA/UA-Partner/*A segments which was my comment about elite benefits because I was trying to lure out the reasons OP wants to book on UA.com

On Google Flights, it gave me the option to book through the united website a round trip from Chicago to Orlando with one way on United, Return on American Airlines.

On the United Website, I couldn't make any changes to the itinerary or book more than 6 passengers.

I've booked several UA-AS itins on United.com via Hipmunk.

What I mean to say is that when entering the desired routing, you could choose which airlines to search. Ual.com would then respond with whatever you instructed it to seek. You could tell it to search Delta flights, for example.

You can't do that now. But depending on the routing, the website may still respond with other airlines.

Sorry for the confusion. I mean airlines that are bookable in addition to a United Segment. For example:
SFO-HKG on United
HKG-SIN on Cathay Pacific

You can even book AA and AS on united.com...if you use google flight..

I have booked UA-AS trips to Hawaii on united.com directly. Outbound UA, return AS. I could have returned on UA but for a higher price and less convenient connection. I was flying from/to a Pacific NW airport that has service from both airlines.