Short answer — the best tools for comparing award availability across multiple dates are:

• Roame (SkyView) — best calendar / month‑wide searches and transfer guidance. SkyView shows availability across long windows (free SkyView Lite for short windows; paid tiers let you scan 60–180 day windows and set alerts), and Roame will suggest the best transfer partner. (help.roame.travel)

• PointsYeah — best for very fast multi‑day searches with rich filters. PointsYeah supports multi‑day/multi‑day ranges and is aimed at quick side‑by‑side date comparisons across programs. (awardwallet.com)

• ExpertFlyer — best for granular award/upgrade inventory, fare‑class detail and saved alerts. It has a “show all dates on 1 screen” / flexible ±day range and reliable fare‑class visibility that pros use to confirm availability. (expertflyer.com)

• point.me — best all‑around real‑time multi‑program search + concierge. point.me searches many loyalty programs and shows booking routes and transfer advice (it also offers paid concierge bookings). Historically its searches can be slower than some tools. (point.me)

• SeatSpy — best airline‑specific year‑view + instant alerts (especially for BA / Virgin / KLM / Air France / United / American and a growing list). Great when you want a full calendar for one airline and fast alerts for specific dates. (seatspy.com)

• Award Nexus (AwardNexus) — best for complex, premium‑class and multi‑route automated searches. It’s paid but built for one‑click multi‑week / multi‑site scans and automated monitoring. (awardnexus.com)

• AwardHacker / AwardHacker‑style tools — best for quick mileage‑pricing comparisons (which programs charge how many miles) but note: they usually don’t show live availability — use them to decide which programs to check for live space. (travellingonpoints.com)

Also worth mentioning for power users:

• KVS Tool — long‑standing desktop tool with deep airline coverage and advanced searches (a bit technical but very powerful). (kvstool.com)

How to combine them (practical workflow)

1. Use Roame or PointsYeah (calendar/SkyView) to find date clusters that have awards. (help.roame.travel)
2. If the cluster looks promising, confirm the specific flight/fare‑class with ExpertFlyer or point.me (ExpertFlyer for fare‑class detail and alerts; point.me for an aggregated live view and transfer/booking guidance). (expertflyer.com)
3. For airline‑specific needs (Avios, AA, United, etc.) use SeatSpy to scan a full year and set instant alerts for the exact route/cabin. (seatspy.com)
4. If you’re hunting complicated premium awards or want automated monitoring across many sites/dates, run an Award Nexus search or buy a Trip Pass. (awardnexus.com)
5. Use AwardHacker to compare which program will cost the fewest miles before you transfer points (it won’t guarantee live space). (travellingonpoints.com)

Pricing & access (quick note)

• Roame, point.me, PointsYeah, SeatSpy, Award Nexus, ExpertFlyer, KVS — all offer paid tiers with the calendar/alert features; free trials or limited free features are common. Check each site for current plans and trial offers before committing. (help.roame.travel)

If you want, I can:

• Recommend which of these matches your travel style (domestic vs international, business/first vs economy, one traveler vs family), or
• Run a few sample searches for a route + date range you give me and show which tools surface the most dates/options.