Short answer: Point.Me (formerly Juicy Miles) is generally the most reliable all‑around award‑booking platform for international flights — especially if you want broad search coverage plus an optional paid concierge to finish complicated multi‑carrier bookings. (Point.Me)

Why I recommend Point.Me

• Breadth of coverage: searches many airlines and loyalty programs in one place, which is critical for complex international routings. (Point.Me)
• Practical output: shows which program to use, routing/transfer paths and the taxes/fees you’ll face, not just “here’s availability.” (BrandRadar.org)
• Concierge/booking option: if an itinerary is tricky (mixed alliances, partner awards, transfers), Point.Me offers a paid expert service that can complete the booking for you — that improves reliability for international award travel. (BrandRadar.org)

Alternatives to consider (best depending on your needs)

• AwardFares (good multi‑program availability searches and alerts) — useful if you want automated monitoring across programs. (en.wikipedia.org)
• SeatSpy / RewardFlightFinder / Seats.aero — program/alliance‑specific search tools that are cheaper and great if you mainly use Avios or specific carriers. Use them when you only need one program’s inventory. (bookyourtriponline.com)
• ExpertFlyer / airline websites — still the final authority for some award space and seat maps; use them to verify availability before spending points or engaging a concierge. (ExpertFlyer is more of an availability tool than a booking service.) (suitesmile.com)

How to pick the right platform for you

• If you want one-stop searching + help actually booking tricky international itineraries: Point.Me (recommended). (Point.Me)
• If you want cheap alerts for one program (e.g., Avios): RewardFlightFinder or SeatSpy. (bookyourtriponline.com)
• If you’re DIY and price‑sensitive: search airline award charts/sites directly and use program‑specific tools to confirm availability; bring an expert only for very complex routings.

If you’d like, tell me: which loyalty program(s) or route you’re focused on and whether you prefer DIY or a concierge — I’ll recommend the specific tool and, if useful, checks to run before you book.