MileagePlus Guide · May 2026

Should You Buy United Miles Right Now?

Everything MileagePlus members need to know about purchasing miles — when it makes sense, how the math works, and how to squeeze maximum value from every mile you own.

Sale active through
May 4, 2026

Current discount
Up to 50% off

Effective cost
From 1.88¢ / mile

Promo cap
50,000 miles

50%

Maximum discount available right now

200K

Miles purchasable per calendar year

72h

Max time for miles to post to your account

What is the United MileagePlus Buy Miles program?

United Airlines’ MileagePlus loyalty program lets members do far more than simply earn miles through flying. The Buy Miles portal at buymiles.mileageplus.com gives members a direct, no-friction way to top up their balance, gift miles to friends and family, or stockpile ahead of a big premium-cabin redemption.

United runs monthly promotional sales throughout the year, offering either discounts (cutting the per-mile cost) or purchase bonuses (giving you extra miles on top of what you buy). The sweet spot most frequent flyer experts agree on: only pull the trigger when you’re getting at least a 100% bonus or a 50% discount — those are the thresholds where the math reliably works in your favour.

Active sale alert: Through May 4, 2026, MileagePlus members can purchase miles at up to a 50% discount — bringing the effective cost down to as low as 1.88¢ per mile for those targeted at the maximum rate. Note that this promotion is capped at 50,000 miles per member.

When does buying United miles actually make sense?

Buying miles is a tool, not a universal strategy. Here are the four scenarios where purchasing miles tends to deliver genuine value:

Premium international cabins

Business and first-class awards to Europe, South America, or Asia offer some of the best cents-per-mile returns. Topping up for a United Polaris business class seat can be a significant saving over a cash ticket.

Topping off for a redemption

Already 8,000–15,000 miles short of your dream award? Buying a targeted batch can unlock that booking without waiting months to earn the difference organically through flights or credit card spend.

Partner airline awards

United miles unlock a vast Star Alliance network. Partner awards on carriers like ANA, Lufthansa, or TAP Air Portugal often price more predictably than United’s own dynamic fare model — and availability can surprise you.

Gifting miles to family

Send miles to another MileagePlus account so a family member or friend can book their own trip. It’s one of the most flexible travel gifts available — and the miles don’t expire while accounts stay active.

How to buy United MileagePlus miles — step by step

1 Visit the portal. Go to buymiles.mileageplus.com and log in with your MileagePlus credentials. The offer displayed is personalised to your account.
2 Check your personal offer. Discounts and bonuses are targeted individually — your offer may differ from the headline rate advertised publicly. Always verify before assuming the best deal applies to you.
3 Select your quantity. Choose the number of miles in increments of 1,000. The total cost and any bonus miles update in real time, letting you dial in exactly what you need.
4 Pay and confirm. Enter your payment details. Using a co-branded United MileagePlus credit card? The purchase counts as a United transaction — you’ll earn bonus miles on the spend itself, effectively reducing your net cost per mile.
5 Wait for posting. Miles generally appear in your account immediately after purchase, but can take up to 72 hours. Once credited, start searching for award availability.

Where can you redeem United miles?

One of MileagePlus’s genuine strengths is the breadth of what you can book. Beyond United’s own flights, your miles open doors across a massive partner network spanning airlines, hotels, car rentals, and more:

United flights
Lufthansa
ANA
Air Canada
Singapore Airlines
TAP Air Portugal
Ethiopian Airlines
Asiana Airlines
Copa Airlines
Hotel stays
Car rentals
Gift cards

Partner awards are especially attractive because they still price at relatively predictable rates — a real advantage in an era where United’s own inventory uses fully dynamic pricing. Routes like Chicago to Lisbon or Newark to Cape Town in business class can represent outstanding value when award space opens up.

Flexibility advantage: Unlike many loyalty programs, United allows you to change or cancel most award bookings without fees. This makes buying miles a lower-risk move — if travel plans shift after your purchase, you’re not locked into a specific trip.

Key rules to keep in mind

→ Annual purchase limit: You may purchase up to 200,000 miles per calendar year. During select promotions, United has raised this limit to 250,000.
→ Current promo cap: The May 2026 sale is capped at 50,000 miles maximum per member — plan your purchase accordingly if you need more than that.
→ No status credit: Purchased miles do not count toward United Premier elite status qualification. They go straight into your award balance only.
→ Credit card stacking: Purchasing through a co-branded United MileagePlus card earns additional miles on the transaction itself — effectively a double-dip that reduces your net per-mile cost.
→ Posting time: Miles are generally credited instantly but can take up to 72 hours. Do not purchase miles if you need them for a booking in the next few hours.

Frequently asked questions

Are purchased miles the same as earned miles?

Yes — once credited to your account, purchased miles behave identically to miles earned through flying or partner activity. There are no restrictions on how you use them; any award redemption is fair game.

Do United MileagePlus miles expire?

MileagePlus miles do not expire as long as your account has at least one qualifying activity — earning or redeeming miles — every 18 months. A purchase counts as qualifying activity and resets that clock.

Can I buy miles for someone else’s account?

Yes. United lets you gift miles to another MileagePlus member’s account directly through the Buy Miles portal. It’s a great option for helping a family member reach a redemption threshold without waiting for them to earn the miles themselves.

What’s the best time of year to buy United miles?

United runs promotions every month, but the peak deals cap at a 100% bonus or 50% discount. Historically, Cyber Week, end-of-year holiday sales, and occasional flash promotions hit those maximum rates. If you see a 50% discount or 100% bonus, it’s worth acting — those are the thresholds most experts recommend.

Will buying miles help me reach Premier status?

No. Purchased miles are credited to your award balance only and do not count toward Premier Qualifying Points (PQP) or Premier Qualifying Flights (PQF). Status qualification requires actual flight activity or eligible credit card spend.

Is it ever a bad idea to buy miles?

Absolutely. Buying miles without a specific, near-term redemption in mind is generally a poor financial move. Miles can be devalued at any time — United has adjusted its award pricing multiple times in recent years. Only buy when you have a concrete redemption planned and the math works in your favour.