I just posted on United's Facebook page at your suggestion. I'm not a big participant in social media so it will be interesting to see if it helps.

I have been trying to book a last min reward ticket for the past hour. Unable to search during this time.

I'm having the same problem. I keep getting the "unable to complete your request" error. I cleared my history but it didn't help....

Fail
 

We are unable to process your request. Please see the message below for details.

We were not able to find any available seats meeting your requirements. You may modify your search criteria, or call 1-800-UNITED-1 (1-800-864-8331) within the U.S. or Canada; elsewhere contact your local United Reservations Office.:td:

Same for me....I've been having on and off issues for the past few weeks.

Fare preferences in All search options with Firefox only shows Cabin and does not let you pick Type of Fare, Upgrade Type or Fare classes.

You do see those options with Safari. However with Safari, the search button does not work.

Either way, searching errors out with the "no available seats" message.

Same problem - can't find flight

I've tried Chrome, Explorer, Safari and the app and none of them return any results. I can see them in Flights and Kayak but they link to the home page of UA not to flight results. I am holding off calling for another hour or so and then need to get my other flight booked.

yea, worse than earlier today. Every flight search just errors out. Using Safari here.

Booked a ticket last night that took over an hour to ticket (I feared it would not and I would have to call today) and then today I cannot even complete any searches for award tickets without getting the error message. Something is definitely broken.

Also having a problem today of no flights returning any availability... something is up! (or down!)

Been having intermittent problems with UA website (again) for past week. Today, no itineraries are returning any available seats. Oddly enough, a search on expedia returns tons of united flights.

Back-end systems are fine, it's the glorious UA front site that is hosed once again.

E

Not seeing any flights on the website or mobile app. Not sure if phone agents can book, but I've been on hold for 15 minutes already.

It's beyond a joke at this stage... how can they run a company like this?

Same here. Occasionally getting funky responses like $3800 economy IAD-DEN.

I need to book. Trying out Delta is looking like an option every minute.