Lindblad Expeditions vs Poseidon Expeditions
Lindblad Expeditions is the larger, National Geographic-partnered operator with the broadest destination range and a premium price point. Poseidon Expeditions is a small-ship purist — a single 114-passenger vessel, the M/V Sea Spirit, built around maximum time ashore and competitive pricing.
Technical Specifications
| Feature | Lindblad Expeditions | Poseidon Expeditions |
|---|---|---|
 Ships | National Geographic Endurance, Resolution, Explorer (+ ~21 other fleet ships) | M/V Sea Spirit |
| Passengers | 126 guests (Endurance/Resolution), 148 guests (Explorer) | 114 guests |
| Ice class / hull | PC5 Category A (Endurance, Resolution) | Ice-strengthened hull, Rolls-Royce stabilizers |
| Founded | 1979, as Special Expeditions | 1999 |
 Time ashore | Varies by itinerary | Up to 3 landings/day, ~2.5 hrs each |
 IAATO | IAATO member | IAATO member since 2011 |
| Destinations | All seven continents | Antarctica, Arctic (Svalbard, Greenland, Iceland), British Isles |
Ships and Fleet
Lindblad Expeditions
National Geographic Endurance and National Geographic Resolution are identical PC5 Category A sister ships carrying 126 guests each; the larger National Geographic Explorer carries 148. Fleet-wide, Lindblad runs roughly 24 owned and chartered ships from 16 to 160 guests.
Poseidon Expeditions
A single ship, the ice-strengthened, Rolls-Royce-stabilized M/V Sea Spirit, carrying 114 passengers — small enough that up to 100 guests can go ashore at once under IAATO's limit, with the rest out by Zodiac or kayak, so no one waits aboard.
Destinations and Itineraries
Lindblad Expeditions
The broadest geographic footprint of any operator on this site — polar voyages plus itineraries across the Americas, Europe, Africa, Asia and Oceania.
Poseidon Expeditions
Focused on Antarctica (priority season), the Arctic — Svalbard, Greenland, Iceland — and the British Isles.
Price and Value
Poseidon Expeditions is generally positioned as a small-ship purist option with competitive pricing relative to larger fleets. Lindblad Expeditions sits at a premium price point, reflecting its National Geographic partnership and fleet breadth. Confirm current, itinerary-specific rates directly on each operator's own website.
Onboard Experience
Lindblad Expeditions
Daily-changing menus, a Chefs-at-Sea guest-chef program, a Seafood Watch partnership, an Open Bridge policy, and undersea specialists/ROVs on newer polar ships. Activities include Zodiacs, sea kayaking, and (ship-dependent) paddleboards, snowshoes and skis.
Poseidon Expeditions
An expedition team of naturalists, biologists, geologists and historians leads shore landings, sea kayaking, Antarctic overnight camping, Zodiac cruising and photography voyages — small ship, big advantage: maximum time ashore, up to 3 landings a day at roughly 2.5 hours each.
Naturalists, biologists, geologists and historians on every voyage.
Who Each Line Is Best For
Choose Lindblad Expeditions for the widest destination choice and the deepest onboard science programming, at a premium price. Choose Poseidon Expeditions for a smaller ship, maximum time ashore on every landing day, and competitive pricing.
Frequently Asked Questions
Which ship is smaller, National Geographic Endurance or M/V Sea Spirit?
The M/V Sea Spirit carries 114 guests, smaller than the 126-guest National Geographic Endurance.
Does Poseidon Expeditions offer more time ashore than Lindblad?
Poseidon markets up to 3 landings a day at roughly 2.5 hours each as a core selling point of its small-ship size. Lindblad's time ashore varies more by itinerary and ship.
Is Poseidon Expeditions cheaper than Lindblad Expeditions?
Poseidon is generally positioned as the more competitively priced, small-ship option; Lindblad sits at a premium price point. Confirm current rates on each operator's own site.
Which operator sails to more destinations, Lindblad or Poseidon?
Lindblad Expeditions has the broader range, sailing to all seven continents. Poseidon Expeditions focuses on Antarctica, the Arctic (Svalbard, Greenland, Iceland) and the British Isles.
Do Lindblad and Poseidon ships have the same ice class?
No. Lindblad's National Geographic Endurance and Resolution are rated PC5 Category A. Poseidon's M/V Sea Spirit uses an ice-strengthened hull with Rolls-Royce stabilizers rather than a Polar Class rating.