Act fast: United is offering one-way US to London flights for just 23,000 miles

You’ll need to act fast if you want to get in on this United Airlines offer. Seriously fast, as in: You need to get moving today to take advantage.

Today only, United MileagePlus members can book one-way economy flights to London’s Heathrow Airport (LHR) from various U.S. destinations (including 23 nonstop options) for just 23,000 miles (plus taxes and fees).

If “23” is your new lucky number, head over to United’s website ASAP to book.

You could jet nonstop from a range of places in the U.S., including Boston Logan International Airport (BOS), Chicago’s O’Hare International Airport (ORD), Houston’s George Bush Intercontinental Airport (IAH), Los Angeles International Airport (LAX), Newark Liberty International Airport (EWR), San Francisco International Airport (SFO) and Washington, D.C.’s Dulles International Airport (IAD).

If you’re not concerned about whether you take a direct flight, you can fly via any mainland U.S. airport with this offer, not just those on United’s nonstop routes.

We spotted the deal available for journeys to and from Miami International Airport (MIA), Portland International Airport (PDX) and Seattle-Tacoma International Airport (SEA), all of which included one stopover.

LHR can also be your starting destination.

Of course, there are a few terms and conditions, as there always are. You’ll need to complete your travel by May 18 of this year, and taxes and fees start from $191.75 one-way. The offer only applies to new award bookings.

However, there are no blackout dates affecting this particular deal. There’s also no limit to the number of award tickets you can book. You can buy a round-trip option if you like, but you’re also not tied to it if you’d prefer to book a one-way flight.

Before you whip your credit card out, browse the full terms and conditions for yourself.

It’s also wise to check if you’re getting the most out of your miles. In TPG’s latest valuations, United MileagePlus miles are valued at 1.21 cents each — so a 23,000-mile spend would be valued at $279.

The loyalty program also has an array of transfer partners, including (but not limited to) Marriott and Hilton.