Upvote:1
You may actually have to consult a travel agent for this. They have access to stuff "behind the scenes" that non-travel agents do not.
While I've not been in this particular situation before, I've had other situations where I could see the flights, see the schedules, see the fares, but could not actually book it myself because they were all part of round-trip tickets or other packages. But then I would consult with my local travel agent and she would usually be able to arrange things for me. Or at least explain why it wasn't available (a special rate on a specific route or something).
Probably not the answer you want, sorry...
Upvote:3
There is no way to guarantee absolute success, but many people find an alternative using the "skipped lag" strategy.
This means you can try to book a flight to some random destination VIA Manchester. When the flight arrives in Manchester, you get off and forfeit the remainder of your journey whilst simultaneously enjoying a cheaper fare.
These bargains are difficult to find on the net, but you can try a site offering such a service. This site may not be around for long however, please read a pending lawsuit.
Upvote:4
What you need to do is book a MAN-BOS return ticket for your partner and a BOS-MAN return ticket for yourself. The price should be similar. Yes you won't fly the MAN-BOS part but oh well. Unlike hidden city ticketing which someone else suggested and is doable only without checked in luggage, there's not much problems with this.
I see the flight you mention by just searching on Kayak and if I search on Kayak for BOS-MAN return with flight out Nov 15 and return Nov 25 it's the same flight out as you wanted and it costs $738. Search Wednesdays for the return date with +-3 days (since you don't care when it is), perhaps you can squeeze it a few more dollars downwards but it's close enough I think.
Here is your partner's and here is your flight.