Daily prices, Jun 3 to Jul 25, 2026

Do hotel price alerts work?

Often, if your booking is refundable: on our daily prices for 12 US hotels (one July 2026 stay, read from June 3, 2026), a 5% drop alert would have fired at 7. But the rate ended higher at 8 of the 12, so an alert helps only if you can still rebook.

To check your own stay today, Underbook's free hotel price checker shows the price each booking site lists on Google Hotels for that hotel and dates, and whether a lower listing names the same room, and it can email you if the going rate for that stay drops: https://underbook.co/hotel-price-checker.

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Measured, June 3 to July 25, 2026

What a 5% alert would have caught, hotel by hotel

Our earlier price watcher read the going rate (the price most booking sites listed, before tax) for one stay, July 25 to 28, 2026, at 12 US hotels once a day from June 3. We ran the checker's rule on it from that first day: an alert when the going rate is at least 5% below the June 3 rate on two daily reads in a row.

A 5% drop alert run on the going rate for one stay, July 25 to 28, 2026, at 12 US hotels, read once a day from June 3
Hotel	June 3	Lowest read	Alert fired	Last read against June 3
Napili Kai Beach Resort, Lahaina HI	$579	$358	dipped one day only	+4%
Hilton Hawaiian Village Waikiki Beach Resort, Honolulu HI	$418	$373	June 25	+9%
The Cosmopolitan of Las Vegas	$348	$301	June 20	−11%
Pod 51 Hotel, New York NY	$224	$172	June 10	+53%
The Standard High Line, New York NY	$414	$414	no	+53%
Hotel Zephyr Fisherman's Wharf, San Francisco CA	$276	$245	July 20	+1%
Fontainebleau Miami Beach	$428	$323	July 22	−4%
The Roosevelt Hotel New Orleans	$295	$262	July 11	+8%
Ace Hotel Downtown Los Angeles	$230	$169	June 16	−10%
Aloft Boston Seaport District	$300	$300	no	+25%
Margaritaville Resort Orlando	$257	$246	no	+43%
citizenM Seattle South Lake Union	$238	$238	no	+21%

The alert fired at 7 of the 12 hotels, on dates from June 10 to July 22, 2026. At 1 more the rate dipped 5% below for a single day, which the two-day rule does not count.
With a 10% line instead of 5%, the same rule fired at 6 of the 12.
At 8 of the 12 the last read was more than 2% above June 3, and 3 of them had fired an alert on the way: a drop is often followed by a rise, so the alert is a moment to act, not a trend.
Across 608 hotels priced twice a week apart for the same stay (181 priced September 22 and September 29, 2026 and 427 priced September 25 and October 2, 2026), the going rate fell 5% or more at 160 of 608 (26%) and rose 5% or more at 236 of 608 (39%).

So an alert does catch real drops: at 7 of these 12 hotels over seven weeks, and at 26% of hotels within one week. It cannot tell you which way the price goes next, which is why it pairs with a booking you can cancel.

Twelve hotels and one summer stay are a small sample: read them as a direction, not a rate. The going rate is the price most sources listed, not one room. The week-later pairs are from the hotel price study (US market, USD, hotels matched by Google's property id).

How an alert decides when to write

Underbook's checker states its rule: "We check the going rate for this hotel and these dates once a day and email you if it is at least 5% lower on two daily checks in a row." Requiring two days in a row means a one-day blip does not send an email; it also means the email comes a day after the drop.

KAYAK, which also sends hotel price alerts, says: "Most Price Alerts are sent once a day." For its real-time alerts: "These trigger when there’s a significant price change, typically a 10% increase or drop, since your last update." Source: KAYAK help, Pricing and Price Alerts, read October 25, 2026.

A higher line sends fewer emails: in our daily series a 10% line fired at 6 hotels where a 5% line fired at 7. Trackers by name, what each watches and what each costs: hotel price trackers, side by side.

What an alert cannot do

It cannot lower a price. It tells you a price you watch has dropped; you pay less only by booking the lower rate and cancelling the first booking, which a non-refundable rate does not allow.

It follows a number, not a room. A drop in the going rate can come from a smaller room or a rate with stricter terms on one site, so read the room name and the cancellation line before you rebook.

It cannot see member prices. Our figures are public prices a signed-out visitor gets; a member or package price can sit below them. More on what happens after you book: hotel price dropped after you booked?

How to make a hotel price alert pay off

Book a refundable rate you are happy with, and note its free-cancellation deadline.
Set an alert for that hotel and those dates, on the site you booked with or with a tracker that checks every day.
When it writes, compare like with like: the same room, the same cancellation terms, the total with taxes and fees.
Book the lower rate first, then cancel the first booking before its deadline.

Checking your own stay

Underbook is a free browser extension for Chrome, Edge and Firefox, and a free web price checker. For a hotel and dates it shows the price each booking site lists on Google Hotels, all-in where the sites report taxes and fees (a resort or destination fee may be extra), and says whether a lower listing names the same room or needs a check before you book. You always book on the site you choose. Its price-drop email checks the going rate once a day and writes when it drops at least 5% on two daily checks in a row.