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Travel · head to head

Kayak vs Opera PMS

Kayak logo

Kayak

Travel

Travel search app comparing flights, hotels and car hire across other booking sites, owned by Booking Holdings

From
Free
Rated
-
Full reviewWebsite
Opera PMS logo

Opera PMS

Travel

Oracle property management system used by large hotel groups and chain estates

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Kayak has a free tier, so it costs nothing to try first.
  • Each has a real cost: Kayak it is owned by Booking Holdings, the same parent as Booking.com and Priceline, so its comparison results are not fully independent of its own group's commercial interests.; Opera PMS integration is billed rather than open, so every connected system carries a per-property interface fee that inflates the running cost well beyond the quoted subscription.
  • They diverge on capability: Kayak covers Flight, hotel and car comparison, Opera PMS covers Reservations and front desk.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Kayak and Opera PMS actually diverge.

Attributes where Kayak and Opera PMS differ
AttributeKayakOpera PMS
Starting priceFreeOn request
Pricing modelFree to users, revenue from referral commissions and advertisingquote
Free tierYesNo
PlatformsiOS, Android, WebWeb, Windows, iOS, Android

Identical on both: user rating (Not yet rated), category (Travel).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Kayak

  • Flight, hotel and car comparison
  • Price alerts
  • Price prediction
  • Flexible date search
  • Trip planning tools
  • Explore/anywhere search

Only in Opera PMS

  • Reservations and front desk
  • Rate and yield management
  • Sales and catering
  • Housekeeping and maintenance
  • Night audit and accounting
  • OHIP integration platform

What people use each for

The jobs each tool is most often brought in to do.

Kayak

  • Comparing flight prices across multiple airlines and booking sites before purchasingnot Opera PMS
  • Setting a price alert to buy a flight or hotel once the price dropsnot Opera PMS
  • Searching flexible dates or nearby airports to find a cheaper farenot Opera PMS
  • Comparing car hire prices across rental companies for a tripnot Opera PMS

Opera PMS

  • A hotel group standardising several hundred properties on one reservation and reporting spinenot Kayak
  • A conference hotel where function space, banquet orders and group blocks drive most revenuenot Kayak
  • A franchisee whose brand agreement mandates OPERA and a specific central reservation systemnot Kayak
  • A resort with multiple outlets that needs tight posting between POS, spa and the guest folionot Kayak

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Kayak

  • It is owned by Booking Holdings, the same parent as Booking.com and Priceline, so its comparison results are not fully independent of its own group's commercial interests.
  • Some airlines opt out of listing on metasearch sites entirely, so Kayak's results are not a complete view of every available fare in the market.
  • Revenue comes from referral commissions, and prominence in results can be influenced by which suppliers pay Kayak more, not purely by lowest price.
  • The actual booking typically completes on a third party site, so problems with a booking, cancellation or refund are handled by that site's customer service, not Kayak's.
  • Displayed prices can change or fail to match by the time a user reaches the booking site, since Kayak is not always querying live inventory in real time for every listed fare.

Opera PMS

  • Integration is billed rather than open, so every connected system carries a per-property interface fee that inflates the running cost well beyond the quoted subscription.
  • Implementation typically requires an Oracle partner and runs for months, which puts a property opening timeline at the mercy of partner availability.
  • Configuration is dense enough that properties rely on one or two trained staff, and losing that person leaves rate and package changes stuck in a support queue.
  • The older OPERA 5 estate is on a migration path to OPERA Cloud, so on-premise customers face a forced project on a timetable set by Oracle rather than by their own budget cycle.
  • Small independent properties pay for group, catering and multi-property machinery they will never use, and lighter systems deliver a working front desk in days rather than months.

Pricing, plan by plan

Kayak

Free
  • FreeFree
    • Unlimited search and price alerts
    • No subscription tier

Opera PMS

On request
  • OPERA Cloud$undefined/year
    • Per-room subscription with tiered functionality
    • Implementation and configuration services quoted separately
    • Interface and integration fees charged per property

Which should you pick?

Choose Kayak if

  • You need flight, hotel and car comparison.
  • You want to start without paying.
  • You work on iOS, Android, Web.
  • You also want price alerts.
Kayak review

Choose Opera PMS if

  • You need reservations and front desk.
  • You work on Web, Windows, iOS, Android.
  • You also want rate and yield management.
Opera PMS review

Questions people ask

Is Kayak or Opera PMS better?
Neither clearly leads. Kayak starts at Free and Opera PMS at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kayak or Opera PMS?
Kayak has a free tier; the other does not. Paid plans start at Free for Kayak and On request for Opera PMS.
Does Kayak or Opera PMS run on more platforms?
Kayak runs on iOS, Android, Web. Opera PMS runs on Web, Windows, iOS, Android.
Can I use Kayak for free?
Yes. Kayak has a free tier, so you can try it without paying. Opera PMS starts at On request.
What is Kayak best used for?
Kayak is most often used for comparing flight prices across multiple airlines and booking sites before purchasing, setting a price alert to buy a flight or hotel once the price drops, searching flexible dates or nearby airports to find a cheaper fare, comparing car hire prices across rental companies for a trip. Of those, comparing flight prices across multiple airlines and booking sites before purchasing and setting a price alert to buy a flight or hotel once the price drops are not what Opera PMS is typically brought in for.
What can Kayak do that Opera PMS cannot?
Kayak covers Flight, hotel and car comparison, Price alerts, Price prediction, Flexible date search. Opera PMS covers Reservations and front desk, Rate and yield management, Sales and catering, Housekeeping and maintenance.

Answered from the vendors’ own pages

Kayak: Does Kayak charge a booking fee?

No, Kayak itself is free to use; it earns referral commissions from the airlines, hotels and sites it sends bookings to.

Opera PMS: Is OPERA Cloud the same product as OPERA 5?

No. They share a name and much of the data model, but OPERA Cloud is a separate multi-tenant application. Moving between them is a migration project, not an upgrade.

Kayak: Do I book directly through Kayak?

Usually the booking completes on the airline, hotel or travel site's own platform after Kayak hands off the click, though some direct booking options exist for select content.

Opera PMS: Why do integration partners charge a monthly fee per hotel?

Because Oracle charges them for certification and API usage through OHIP. Partners pass that on, so budget for it per connected system per property.

Kayak: Is Kayak owned by an airline or hotel chain?

No, it is owned by Booking Holdings, which also owns Booking.com, Priceline and Agoda.

Opera PMS: Can a single independent hotel buy OPERA?

Yes, but the economics rarely work below roughly 100 rooms unless a brand agreement requires it.

Opera PMS: How long does implementation take?

Plan for three to six months for a single complex property, longer for a multi-property rollout.

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