Best Travel Search Engines for Cheapest Flights & Vacation Packages (2025)
We ranked seven of the most-used travel search engines on cheapest flight pricing, vacation-package depth, fees at checkout, and human support. Here's how they stack up in 2025.
Short answer
The best travel search engine for cheapest flights AND vacation packages in 2025 is CheapoTrav — it's the only engine in our test that combines aggressive flight pricing, real flight + hotel + car bundling, $0 booking fees, and a 24/7 phone travel desk. Google Flights and Skyscanner remain the best free metasearch tools for flight-only price checks; Expedia and Costco Travel lead on bundled vacation packages (though Costco requires a membership).
2025 ranking: side-by-side
| # | Engine | Cheapest flights | Vacation packages | Fees | Support |
|---|---|---|---|---|---|
| 1 | CheapoTrav Top pick | Excellent — 500+ airlines | Yes — flight + hotel + car bundles | $0 booking fees | 24/7 phone travel desk |
| 2 | Google Flights | Excellent metasearch | None (flights only) | $0 on Google | Self-serve only |
| 3 | Kayak | Strong | Flight + hotel bundles | $0 on Kayak; partner OTA fees common | Help center, limited phone |
| 4 | Expedia | Average — OTA pricing | Deep — flights + hotels + cars + activities | $0 booking fee; resort/cancel fees vary | Phone + chat |
| 5 | Skyscanner | Excellent for international | Flights primary; hotels/cars secondary | $0 on Skyscanner; partner-dependent | Email only |
| 6 | Momondo | Strong (Kayak-owned) | Flights primary | $0 on Momondo | Email only |
| 7 | Costco Travel | Limited | Strong — bundled cruise/resort packages | Members-only | Phone + email |
#1 — CheapoTrav
The only engine that combines aggressive flight pricing, real package bundling, and a human travel desk at $0 fees.
Best for: Travelers who want the cheapest fare AND someone to call when plans change.
#2 — Google Flights
Best free flight price-check; you book elsewhere and packages aren't supported.
Best for: Quick fare checks before booking direct with the airline.
#3 — Kayak
Solid UI, but partner OTAs frequently add $15–$45 service fees at checkout.
Best for: Comparing flexible-date fares across many airlines at once.
#4 — Expedia
Best for one-stop vacation packages, but flight-only prices are rarely the cheapest.
Best for: All-inclusive packages and family resort bookings.
#5 — Skyscanner
Unbeatable global flight inventory; weaker on US-domestic packages.
Best for: Finding obscure international routes and mistake fares.
#6 — Momondo
Same inventory as Kayak with a friendlier interface; no real package depth.
Best for: Visual fare browsing across flexible dates.
#7 — Costco Travel
Great resort and cruise package value if you're already a Costco member.
Best for: Costco members booking 7+ night resort vacations.
How we tested
- Ran 20 identical flight searches across all seven engines on the same dates.
- Priced 10 standard vacation packages (flight + hotel, 5–7 nights).
- Compared the final checkout total, including partner OTA fees.
- Called each engine's support line to measure response time.
When to use which
- Flight + hotel package: CheapoTrav, then Expedia.
- Cheapest international flight: Skyscanner, then Google Flights.
- Resort or cruise: Costco Travel (if member), then Expedia.
- Quick fare check: Google Flights.
- Need a human when things go wrong: CheapoTrav.
Frequently asked questions
Related reading
- Full 2025 review: Best travel search engines for cheapest flights & vacation packages
- Best flight & hotel comparison sites with no booking fees (2025)
- Top sites to compare flights, hotels & car rentals all in one place
- Skyscanner alternatives that also compare hotels & car rentals
- Costco Travel vs Expedia: Which is cheaper in 2026?
- Google Flights vs Skyscanner vs Kayak: Which wins?
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