Should You Buy Miles in 2026?

Buying miles is one of the easiest travel tactics to romanticise and one of the easiest to misuse. The appeal is obvious. A premium cabin costs a fortune in cash, an airline announces a huge bonus, and suddenly the idea of buying your way into a redemption feels clever. Sometimes it is. More often, it is just a prettier version of prepaying for a weak asset. Detailed buying-miles math is well covered by The Points Guy's reference on buying airline miles.

The right answer in 2026 is not “never buy miles.” It is much narrower than that. Buying miles makes sense for a small set of tactical reasons and becomes dangerous the moment it drifts into hobby optimism.

The only three reasons to buy miles

1. You need a top-up for a booking that is ready now

This is the cleanest case. If you are a small number of miles short, the award space is live, and the purchase closes the gap efficiently, buying miles can be rational. In these situations, the purchase is not really an investment decision. It is a transaction cost inside a larger booking.

2. You have found real premium-cabin value and the arithmetic still works

This is the classic case people talk about, but it only works when all the pieces are real at the same time:

• The seat exists.
• The programme can actually book it.
• The taxes and surcharges are tolerable.
• The purchased-mile cost still undercuts the cash alternative materially.

If any one of those pieces is missing, the story collapses quickly.

3. You need to preserve or activate value already in an account

Sometimes a small purchase makes sense not because the purchased miles are attractive on their own, but because they protect an existing balance from expiry or make an otherwise stranded redemption possible. This is less glamorous than a business-class bargain, but often more rational.

Why most mile purchases are still bad buys

The big problem is that many travellers buy miles as if they were buying certainty. They are not. They are buying exposure to a programme's future behaviour.

Airline miles can be useful, but they are not cash, not bank points, and not especially member-friendly assets over long holding periods. Airlines can change pricing logic, reduce access, alter surcharges, or make award inventory harder to reach. If you buy speculatively, you are effectively saying: "I trust this programme not to make my future redemption materially worse before I use these." That is not a bet I recommend making lightly in 2026. The U.S. Department of Transportation's frequent-flyer programme guidance is explicit that programmes can change terms with limited notice in many cases.

The bonus is not the story

Mileage sales are marketed through the size of the bonus because that is emotionally persuasive. But a large bonus does not tell you whether the purchase is actually good. It tells you that the airline wants your money now.

The only number that matters is your effective all-in cost for the final trip you want. If a sale cuts the purchase price sharply but the programme is hard to book, highly dynamic, or surcharge-heavy, the bonus may be little more than theatre. AwardWallet's running buying-miles guide tracks current sale prices alongside redemption-cost benchmarks for exactly this reason.

This is why some programmes are much better purchase candidates than others.

Which programmes are usually more defensible purchase candidates?

LifeMiles

LifeMiles often stays in the conversation because it can still be useful for Star Alliance partner access and because it tends not to make the surcharge side of the equation unbearable. The catch, as ever, is execution friction. If you buy LifeMiles, you should do it because you have already proved the booking path is working, not because the sale email looked exciting.

Aeroplan

Aeroplan can be a rational purchase candidate when the route, partner mix, and award logic line up. It is rarely the cheapest currency to acquire, but it can still be one of the cleaner ones to use well if you actually know where you are going.

Alaska Mileage Plan

Alaska Mileage Plan (now part of Atmos Rewards) can still be interesting in the right partner context, but it should never be treated casually. Purchase only when the specific redemption path and current pricing justify it. Independent reviews from The Points Guy on Alaska Mileage Plan remain a good sanity check before any purchase.

What the May 2026 buy-miles market actually looks like

The cleanest way to evaluate any promotion is to compare its all-in cost per mile to a realistic redemption value. Five programmes anchor the buy-miles calendar.

• Avianca LifeMiles runs the most aggressive sales of any major Star Alliance currency. A 160 percent bonus that ran through April 2026 brought the effective cost to roughly 1.27 US cents per mile. The 145 to 155 percent tier, which appears multiple times each year, prices miles at 1.32 to 1.40 cents. LifeMiles members can buy up to 200,000 miles before bonus in a single transaction and up to 500,000 base miles per calendar year.
• Air Canada Aeroplan runs structurally weaker promotions than its closest peers, but the May 2026 cycle illustrates the right comparison. The base price is 3.75 cents Canadian per point; a 90 percent bonus from 14–31 May 2026, documented by Prince of Travel, brought the effective price to about 1.97 cents Canadian (roughly 1.45 US cents) per point. Earlier 2026 sales offered a 30 percent direct discount at roughly 2.6 cents Canadian per point, which is a much weaker proposition.
• United MileagePlus ran an offer through 24 June 2026 with a tiered bonus structure that reached 100 percent on the top band, bringing the effective cost to 1.88 cents per mile, alongside a 50 percent discount track at roughly 1.93 cents per mile. MileagePlus capped purchases at 50,000 miles every 90 days, 200,000 per calendar year.
• American AAdvantage rarely runs deep promos and instead leans on an ongoing 40 percent discount on tier-six purchases, reported by AwardWallet at roughly 2.25 cents per mile. Receiving accounts must be at least 30 days old, and the calendar cap is 200,000 miles.
• Singapore Airlines KrisFlyer very rarely sells miles directly at attractive rates. The path most members use is transferring flexible bank points, with promotional periods on Amex Membership Rewards transfers giving a better effective rate than buying KrisFlyer directly.

A simple decision tree on cents per mile

The thresholds below assume a near-term, specific redemption rather than speculation.

• Under 1.4 cents per mile, defensible for premium-cabin Star Alliance redemptions on LifeMiles or Aeroplan if award space is held and surcharges are tolerable. This is the range that historically pays back on long-haul business or first-class redemptions where cash fares clear $4,000.
• 1.4 to 1.9 cents per mile, defensible only for specific, high-value redemptions where the cash alternative is meaningfully above 2 cents per mile in real terms. Useful for top-ups, less useful for accumulation.
• 1.9 to 2.5 cents per mile, rarely defensible for accumulation. Top-ups for a confirmed award only.
• Above 2.5 cents per mile, almost never defensible. At this price you are buying miles from the airline at a rate that approaches or exceeds the airline's own retail valuation. The expected redemption rarely repays the premium.

The arithmetic gets sharper when you compare against transferable points. Membership Rewards or Ultimate Rewards earned at 2 to 5 points per dollar on relevant categories, then transferred 1:1 into the same airline, almost always beat a direct buy-miles purchase on a long-horizon basis. Buying becomes the right tool only when the timing window is too short for organic earn to catch up.

The risks the sales pages never list

The first risk is repricing. A purchased balance is exposed to the same chart changes and dynamic-pricing logic as an earned balance, and the past 18 months have produced devaluations across LifeMiles short-haul Star Alliance, Avios long-haul carrier-imposed fees, and Asia Miles long-haul business pricing. A 160 percent bonus on miles you cannot use without a 15 percent more expensive chart is not a 160 percent bonus.

The second risk is tax. Taft Law's primer on the federal excise tax notes that US members technically pay tax on all frequent-flyer miles purchased from an airline mileage-awards programme and then file a claim for refund on miles ultimately redeemed for non-taxable transportation. The miles themselves are not income, but the original purchase carries the 7.5 percent transportation excise tax in most cases, which is already baked into the published per-mile rate.

The third risk is fraud. The official airline buy-miles portal is normally hosted by Points.com on behalf of the carrier, and any non-portal "miles broker" advertising stacked promotions or wholesale rates is operating against the programme's terms. Several US airlines have closed accounts and confiscated purchased miles when third-party brokers were involved. Buy directly through the airline or not at all.

The fourth risk is the speed mismatch. Bought miles typically post within minutes to hours, but premium award space can disappear in the same window. Anyone buying miles without an active hold on the target award is gambling on inventory that has no obligation to remain available.

Which programmes are weaker purchase candidates?

In general, the weakest purchase candidates are highly dynamic programmes where the cash-equivalent logic of the miles can move around too much. Buying miles into a programme with unstable practical pricing can be like buying store credit for a store that changes its shelf prices every time you walk back in.

That does not mean you can never buy into those ecosystems. It means the burden of proof is much higher.

How to evaluate a miles sale properly

Start with the trip, not the promotion

The first question is not “How good is this sale?” It is “What exact trip am I trying to book, and is the award available now?” If you reverse that order, you are already halfway to a bad purchase.

Price the whole ticket, not just the mileage line

Include taxes, surcharges, and change risk. The cheapest published mileage number is not always the cheapest final transaction.

Compare against the best real cash alternative

Do not compare against a fantasy last-minute published fare you were never going to pay. Compare against the best realistic cash option you would actually consider.

Ask what happens if the seat disappears in the next hour

This is the psychological test that filters out many bad decisions. If the award space vanishes after you buy the miles, are you still happy to hold them? If the answer is no, you should not be purchasing before you are ready to ticket.

Why flexible bank points are still better

Even in a world where buying miles can work tactically, flexible bank points remain the superior strategic asset. They preserve optionality. Airline miles do not. A bank-points balance can still be pointed at multiple programmes when live space appears. A purchased airline balance is trapped inside one ecosystem the moment you hit buy.

This is why the best frequent-traveller portfolio in 2026 is not built on repeated speculative mileage purchases. It is built on flexible points, informed transfers, and occasional tactical mile buying when the opportunity is unusually clear.

What disciplined mile buying looks like

• You have the itinerary.
• You have checked the taxes and rules.
• You know why this programme is the right booking tool.
• You can ticket now, not “soon.”
• You are not relying on the airline to behave kindly after the purchase.

If you can say all of that, a purchase may be sensible. If you cannot, the sale is probably not really for you.

The 2026 answer

You should buy miles in 2026 only when the reason is immediate, specific, and numerically convincing. Top-up need? Fine. Live premium redemption with good total math? Possibly. Small purchase to protect an existing balance? Sensible. Everything else is usually speculation dressed up as savvy.

The better you get at points and miles, the less often you will feel tempted by the bonus headline and the more often you will ask the only question that matters: what does this purchase let me book, right now, on terms that are actually better than cash?