Marriott Bonvoy and United MileagePlus launched a joint summer promotion in mid-2026 named “Stay, Fly, Earn” that rewards members for activity across both programs during the promotional period. Cross-program promotions between a major hotel chain and a major airline are relatively rare outside of status-match campaigns, making this one worth examining closely. The structure typically awards bonus United miles for Marriott stays, bonus Marriott points for United flights, or both, with registration required and caps on the total bonus. For frequent flyers who already have stays and flights planned across the two programs, the promotion can add incremental value. However, the mechanics of posting — when points and miles actually appear in each account — introduce timing risks that affect whether the bonus arrives in time for planned redemptions. This article breaks down the promotion’s structure and the posting-time considerations for 2026.
The “Stay, Fly, Earn” promotion links a member’s Marriott Bonvoy and United MileagePlus accounts, enabling cross-earning during the promotional window. While the specific bonus rates and caps vary by the final offer terms, typical structures in similar past promotions have awarded one United mile per dollar spent on qualifying Marriott stays and one Marriott point per dollar spent on qualifying United flights, beyond the base earning in each program. Some versions of the promotion have added a fixed bonus of several thousand miles or points upon reaching spending thresholds.
Registration is mandatory and must be completed through both programs’ promotion pages before qualifying activity. The promotion period likely spans the summer months of June through August or July through September 2026. Activity before registration does not qualify, even if it falls within the promotional window. This registration requirement is the first posting-time risk: if you book a trip before registering and expect the stay or flight to qualify, you will not receive the promotional bonus. Register first, then book, and verify that your Marriott and United accounts show the promotion as active on both dashboards.
The promotion interacts with existing elite tier bonuses in both programs. Marriott Bonvoy elite members earn tier-based bonus points on qualifying stays — 10% for Silver, 25% for Gold, 50% for Platinum, 75% for Titanium, and additional benefits for Ambassador. United MileagePlus elite members earn tier-based bonus miles on qualifying flights — Premier Silver earns a 40% bonus on base miles, Premier Gold 60%, Premier Platinum 80%, and Premier 1K 100%.
The “Stay, Fly, Earn” promotional bonuses likely stack with these elite tier bonuses, meaning the total points and miles earned on a qualifying activity can be meaningfully higher than the base earning. However, the promotional bonus is calculated on a different basis than the elite tier bonus. Marriott elite bonuses apply to base points, while the United promotional bonus may apply to dollars spent. United elite bonuses apply to base miles, while the Marriott promotional bonus may apply to dollars spent. The bases are different, and adding up the headline rates to a single blended return percentage can be misleading. Review the promotion terms for the precise earning basis of each bonus component before extrapolating total returns.
Posting time is the central risk in any cross-program promotion where the bonus depends on activity in both accounts. Marriott points from a completed stay typically post within three to five business days after checkout, though delays can extend to two weeks during high-volume periods or if the property uses a manual posting process. United base miles from a completed flight typically post within 24 to 48 hours after the flight lands, and elite bonus miles post simultaneously with base miles.
The promotional bonus — the extra United miles for Marriott stays or the extra Marriott points for United flights — typically posts on a separate timeline, often four to eight weeks after the end of the promotion period or after the qualifying activity, whichever is later. This matters for two reasons. First, the promotional bonus may arrive too late for a planned redemption during the summer travel season. If you are counting on the bonus United miles to book an award flight in August, and the promotional posting takes until October, the points will not serve that purpose. Second, if either your Marriott or United account is flagged for any reason — address mismatch, recent account merger, or fraud review — the promotional posting may be delayed or require manual intervention. Keep documentation of all qualifying activity, including hotel folios and flight confirmations, until the promotional bonus posts.
Given the lag in promotional bonus posting, the most reliable approach is to treat the promotion as a forward-looking earning opportunity rather than a source of points for near-term redemptions. If you have Marriott stays and United flights already planned for summer 2026, register for the promotion, track your qualifying activity, and plan to use the bonus points and miles for travel later in 2026 or into 2027. This approach removes the pressure of a tight posting deadline and allows the bonus to top up your balances for future bookings rather than relying on it for immediate travel.
If you need United miles for a redemption during the summer, funding that redemption through a credit card transfer bonus or a points top-up purchase may be more reliable than waiting for the promotional bonus to post. Chase Ultimate Rewards transfer to United at 1:1, typically instantly. Marriott Bonvoy points transfer to United at a 3:1 ratio with a 5,000-mile bonus for every 60,000 points transferred, but the transfer takes 48 hours or more and carries its own timing risk. The promotional bonus is not a substitute for these channels when timing is critical.
The “Stay, Fly, Earn” promotion adds value to activity you are already planning, but it should not be the primary reason to book a Marriott stay instead of a competing hotel or to fly United instead of another airline. The incremental bonus is modest relative to the cost of the underlying stay or flight. If a Hyatt property offers a meaningfully lower rate or a better location than the closest Marriott, the promotional United miles are unlikely to offset the difference. If Delta offers a more convenient schedule or a lower fare than United on the same route, the promotional Marriott points are similarly unlikely to justify choosing the less optimal flight.
The promotion works best as a tiebreaker. If you are indifferent between two hotel options and one is a Marriott that will trigger the promotion, choose Marriott. If you are indifferent between two flight options and one is on United, choose United. In all other cases, make the best travel decision for your trip and treat any promotional bonus as an unplanned windfall rather than a factor in the decision calculus.
The information in this article draws from publicly available Marriott Bonvoy and United MileagePlus program terms and conditions as of July 2026, along with the published “Stay, Fly, Earn” promotion details as announced by both programs. Posting-time estimates for base activity and promotional bonuses reflect typical processing windows as documented in program FAQs and observed through mid-2026, not guarantees. Elite tier bonus structures and earning rates are based on published program documentation. Point transfer rules between Marriott and United reflect the published terms of both programs as of the data date. All promotion mechanics, bonus rates, and eligibility requirements should be verified on Marriott’s and United’s official promotion pages before registering or booking.
Q: Do I need to have both a Marriott Bonvoy and United MileagePlus account to participate? A: Yes. The promotion requires linked accounts in both programs. If you only have one, you can create the other for free on the program’s website. Both accounts must be in good standing and have matching personal information to link correctly.
Q: How long after my stay does the promotional United miles bonus post? A: Promotional bonuses typically post four to eight weeks after the promotion period ends or after the qualifying activity is verified. This is separate from the base points posting timeline. If the bonus has not posted after the stated timeframe, contact the program through which the bonus was supposed to arrive with documentation of qualifying activity.
Q: Can I earn the promotional bonus on award stays and flights? A: In most hotel-airline cross-promotions, award stays and flights do not qualify for the promotional bonus because there is no qualifying spend. Revenue stays and flights in qualifying rate classes and fare classes are typically required. Check the specific promotion terms for eligibility rules.
Q: Does the promotion apply retroactively to stays or flights before I registered? A: No. Registration must be completed before the qualifying activity occurs. Activity before registration, even if it falls within the promotional period, does not earn the promotional bonus. Register as early as possible, ideally before booking, to ensure coverage.
Q: What happens if my Marriott stay posts with the wrong folio amount? A: If the posted folio amount is incorrect, your base points and elite bonus may be wrong, which could affect the promotional bonus calculation. Contact the property or Marriott customer service to correct the folio before the promotion period ends. Retain your checkout folio as documentation.
This article draws topic direction from coverage by Prince of Travel on the Marriott Bonvoy and United MileagePlus “Stay, Fly, Earn” summer promotion. The original reporting at princeoftravel.com describes the promotion structure, earning mechanics, and strategic implications. Specific details on Marriott Bonvoy elite tier bonuses, United MileagePlus elite tier bonuses, point transfer rules, and posting timelines were independently verified against each program’s official terms and conditions as of July 2026. Promotion-specific details including registration requirements, qualifying activity definitions, and bonus posting timelines should be confirmed on Marriott’s and United’s official promotion pages. The analysis interprets the promotion through the lens of posting-time risk management but does not guarantee bonus posting timelines or specific earning outcomes.