The Silfra SnorkelingSilfra Combo Tours — Full-Day Adventures with the Fissure
The $192 lava tunnel combo
Morning: Raufarhólshellir lava tunnel walk. This volcanic cave opened in a lava flow roughly 900 years ago and is the kind of Icelandic geology that makes the country feel otherworldly. Afternoon: Silfra snorkel, same fissure experience as the single-site tours (Big Crack → Hall → Cathedral → Lagoon, 30–40 min in water). Total window 5–10 h depending on route; Reykjavík transport included. Small group, English-speaking guide. 4.5 stars from 220 reviews. One reviewer said "the dry suits do a good job of keeping you dry and we ended up not needing the towels." Winter note: one reviewer took it in a snowstorm and loved it. "Silfra in a snowstorm" — if that appeals, book this combo in December–February.
The $295 Golden Circle combo
The classic full-day Iceland introduction. Departs Reykjavík morning, returns evening. Stops: Þingvellir National Park (where Silfra is located), Geysir hot spring, Gullfoss waterfall. Then the snorkel in the fissure (Big Crack → Hall → Cathedral → Lagoon, 30–40 min in water). Total 10 h. Small coach, English guide. 4.8 stars from 303 reviews. This is not a sightseeing tour that ends at Silfra; the snorkel is the finale. You will do the Golden Circle, then suit up and descend into the fissure. One reviewer considered self-driving the Golden Circle, glad she didn’t: "I wouldn’t have booked other parts without the guide." Another reviewer noted the team "kept them warm even at -8 degrees and windy." Winter note: same water temperature year-round, but Þingvellir in winter can be snowy and very photogenic. Snorkel last, when you are ready for the cold plunge.
Combo vs single-site: the trade-off
Single-site tours ($127, $143, $213): focus on the fissure alone, 3–4.5 h total. Best if you just want Silfra and have limited time. Highest rating: 4.9 stars ($143 photos tour).
Combo tours ($192, $295): pair Silfra with other sites, 5–10 h. Best if you want to maximize your day or prefer guided planning. Ratings 4.5–4.8 stars. Trade-off: more ground to cover, more time in vehicles, less flexible pacing. But you see multiple sides of Iceland and have one guide manage logistics.
The lava tunnel: Raufarhólshellir
A walk-through lava cave that formed when volcanic rock cooled around flowing lava, leaving a hollow tunnel. Iceland has dozens of these, but Raufarhólshellir is one of the more accessible full-day options. Roughly 900 years old, the cave is cold, humid, and quiet — a completely different experience from the fissure. You enter through a narrow slot canyon, walk into the main chamber (tall enough to stand), see strange rock formations, exit the other side. Not claustrophobic for most; the main chamber is open. You will be wearing warm layers and hiking boots. After the lava tunnel, you return to Reykjavík for a midday or early-afternoon meal break, then head to Silfra for the snorkel.
The Golden Circle: Þingvellir, Geysir, Gullfoss
Þingvellir: the site of Silfra. Above ground, you will see the rift valley stretching north and south, the continental-plate boundary visible in the landscape. Geysir: a hot spring field where the Strokkur geyser erupts roughly every 10 minutes, shooting hot water 20–40 meters into the air. Gullfoss: a two-tiered waterfall, Gullfoss (which means "golden waterfall" in Icelandic) dropping into a canyon. All three are UNESCO-adjacent or protected sites. Then you dive into Silfra. One reviewer said the experience was "unmatched — the water was crystal clear and tasted great." (You can drink it; guides often encourage you to take a sip mid-swim.)
Should you add the diving option?
No combo includes diving (diving is $280 on its own, certified divers only). Snorkeling is open to anyone who can swim; diving adds drysuit certification or ~10 logged drysuit dives. If you want to dive Silfra, book the $280 dive tour separately or on a different day. Read snorkeling vs diving explained.
Read the detailed reviews
Full reviews of each combo tour.
- $192 lava tunnel combo review
- $295 Golden Circle combo review (the most versatile)
Can’t make these dates?
Browse more available silfra snorkeling and find one that fits your schedule — all with instant confirmation and free cancellation.
Prefer snorkeling only? See the three snorkeling-only tours. Still deciding? Read the complete guide.
Frequently asked questions
How long is the snorkel part of the combo tours?
Same as any Silfra tour: about 30–40 minutes in the water. The total combo window is longer because you are visiting other sites first. Lava tunnel combo is 5–10 h total; Golden Circle is 10 h total.
Which combo should I book?
Lava tunnel ($192) if you want geology and caves plus the fissure, prefer full-day focus. Golden Circle ($295) if it is your first Iceland visit, you want the “classic” day, or you prefer a coach and guide managing the route. Both 4.5–4.8 stars.
Can I skip the other sites and just do the Silfra snorkel?
On the combo tours, no — you are committed to the full route. If you only want Silfra, book the $127, $143, or $213 single-site snorkeling tours instead.