From Mykonos: Delos & Rhenia Islands Half-Day Trip by Boat

Two islands, one boat, and history plus swim time. This half-day cruise from Mykonos pairs Delos UNESCO ruins (self-guided) with time to cool off in Rhenia’s clear water, with BBQ onboard keeping the day easy.

I like the balance here: you get a meaningful Ancient Greek stop without it turning into an all-day hike, and then you spend real time by the sea instead of just staring at postcards. The crew also leans into good energy—music, hosting, and a dance party on the ride back—so the trip feels like an actual day out, not a chore.

The main thing to plan for is the practical stuff: the sea can be choppy, and access to the Rhenia beaches is not always effortless. Bring what you need for sun and water comfort, and you’ll be fine.

Key things I’d zero in on

• Rhenia water time that’s long enough to matter: a big chunk of the day is built for swimming and relaxing, not just one quick dip.
• Delos without a strict pace: the ruins are self-guided for about two hours, so you can set your own rhythm.
• BBQ plus drinks onboard: lunch is part of the flow, and many guests report unlimited wine and soft drinks.
• A lively crew vibe (Mola, Mohamed, and Michael show up in the stories): warm hosting, safety checks, and a party mood on the return.
• Real-world conditions: summer heat on Delos and bumpy boat moments mean packing smart matters.

Getting to the boat: Old Port, bus station, and how the day starts

Your day starts at the bus station at the Old Port of Mykonos. You’re not hunting for a hidden pier in a maze. You just show up, match your plans to the boat crew, and get on with it.

Once you’re aboard, the format becomes clear. You’re sailing out first, then you’re living your itinerary in chunks: one long stop for swimming and lunch, then one concentrated visit to Delos, then back home with that upbeat music-and-dancing atmosphere.

If you’re prone to motion sickness, take it seriously. Several guests mention that the ride can feel rough, and if the day is windy, the boat ride can feel bouncy. A small stash of sea-sickness meds in your bag is a cheap kind of insurance.

Sailing times that shape the whole experience

This is a 6.5-hour half-day format, and the timing matters. You’ll spend about 45 minutes heading to Rhenia, then a long 3-hour window on Rhenia with BBQ. After that, you get to Delos for about 2 hours on-site, with the sailing between stops built into the schedule.

That setup means you don’t get stuck in long travel stretches. Instead, you get repeated “activity hits.” Swim. Eat. Swim or relax. Walk the ruins. Then you’re back.

Also, there’s flexibility. Many trips give you one choice, but here you effectively get a decision point: you can prioritize Delos sightseeing, or stay on the boat for additional sea time depending on how you feel and what the crew is running that day.

Rhenia Island: the swimming stop people remember

Rhenia is the star for sea lovers. The water is described as crystal-clear and bright—blue-green tones that make you want to get wet fast. The best part is the duration: you’re there long enough to choose between floating, swimming, snorkeling attempts, and just hanging out.

What the stop feels like

The boat typically doesn’t park right on a dock like a harbor tour. Guests report it can be closer to a drop-in swim setup, so you may jump from the side of the boat or wade short distances depending on the day and the exact stopping point. A guest noted they used pool noodle support when swimming toward the island area, which tells you the vibe is relaxed and aided—not a strict athletic challenge.

BBQ lunch on deck

Lunch is timed so you’re fed after some water time. The included BBQ is part of why this feels like a complete day rather than a rushed sightseeing snack. You also get fruit, and many guests mention that drinks flow alongside lunch, including reports of unlimited wine and soft drinks.

Snorkeling reality check

Some people love seeing fish and clear visibility. One guest specifically said snorkeling wasn’t great at the particular beach spot. That doesn’t mean it’s a waste—it means you should treat Rhenia snorkeling as a bonus, not a guarantee. If you want a sure thing, come for the swimming and the water clarity, not just fish spotting.

Beach comfort

Rhenia’s beaches are often described as beautiful, but the access can be rocky. If you have water shoes, they’re worth packing. If you don’t, be ready to step carefully when you’re getting in and out.

Delos UNESCO: two hours to see a lot without frying

Delos is one of those places where the ruins feel bigger than you expect. You can’t physically cover everything in two hours, but you can still get the big picture fast—especially because the visit is self-guided.

How the Delos time is structured

You’ll arrive, then get around two hours for sightseeing. Since it’s self-guided, you can pace yourself. That freedom is valuable at Delos because there’s little shade in key areas, and the ground can get brutally hot in summer.

One guest suggestion that’s worth copying: if you want to maximize comfort, plan your walk so you hit the higher viewpoint area first while conditions still feel manageable, then work through the rest.

Where you’ll spend your energy

Delos has a lot to look at—ruins, plaques, and a map so you can follow along. That means you don’t need a formal guide to understand the basics of what you’re seeing. It also helps that you’re not stuck in a scripted route where you’re forced to move at a set pace.

And yes, Delos can be so hot that it affects the schedule. One review mentioned Delos closing early due to heat, and the crew shifted the plan toward more swimming time afterward. That’s not something you can rely on, but it’s a good reminder: bring water, sunscreen, and a hat, and assume you’re walking in strong sun.

What Delos is not

You’re not here to swim. Delos is for walking and soaking up the archaeological atmosphere. When you’re done, you’re not endlessly waiting around—you’re headed back to the boat and your sea time.

Onboard crew energy: the real secret sauce

A lot of day tours claim they’re fun. This one tends to deliver. The crew runs a friendly, hands-on vibe and keeps people feeling included.

Several guests call out specific crew members. You’ll see names like Mola, Mohamed, and Michael pop up in reviews, and that matters because it paints a picture: this isn’t a silent-operation transport. It’s a team that watches the group, helps with safety during water stops, and keeps the mood up.

When the boat turns toward the return trip, the energy often becomes a full-on party. Reviews repeatedly mention music and dancing during the way back, with crew members encouraging people to join in. If you love that sort of social atmosphere, you’ll like this. If you don’t, you can still enjoy it as background fun—just stay near the parts of the boat where you can relax.

Price and value: paying for boat time plus two experiences

At $101 per person for about 6.5 hours, you’re paying mainly for a boat day that includes the ride, the planned stops, and onboard food. Included is the boat trip, BBQ and fruit, fuel, and crew.

Delos entrance is not included and is listed at about €20. So if you’re adding it up, plan for a total closer to roughly $101 + the Delos fee.

Is it good value? For most people, yes—because you’re getting two high-effort experiences in one day:

• a UNESCO site visit with a meaningful walking window
• a long, water-centered Rhenia stop with BBQ

Also, the “two-phase” structure saves money compared to piecing together separate boat transfers plus a dedicated Delos visit.

The one caveat: if your personal focus is solely Delos ruins, you’ll pay for the swimming and sea-time package whether you use it or not. On the flip side, if your main goal is sea time in clear water, Delos is the optional history component you’ll still get to enjoy for two hours.

What to pack so the day stays fun

This trip has two environments: bright sun on land and saltwater close to the boat. Pack like you’re going to both.

Bring:

• Passport or ID card (required)
• Sunscreen, hat, and sunglasses (Delos can get hot)
• Water-friendly footwear if you have it (Rhenia can be rocky)
• A swimsuit you can actually wear right away
• Towel or dry clothes for the return, if you can
• Sea-sickness meds if you’re sensitive to motion (the ride can be choppy)

Snorkeling gear isn’t guaranteed. Snorkeling equipment can be purchased on board, so you don’t have to carry it from town.

And if you’re planning to walk Delos under full sun, treat it like a hike: water first, then sightseeing.

Who this trip fits best (and who should think twice)

This is a strong fit for:

• Couples and small groups who want one memorable history stop plus real swimming time
• People who like active days but still want the schedule handled for them
• Travelers who enjoy a social atmosphere and don’t mind music and dancing on the return

Think twice if:

• You only want a calm, quiet museum-style visit. This boat day is social by nature.
• You’re very sensitive to boat motion or rough seas. The ride can be bumpy, and you should plan accordingly.
• You struggle with basic water access. Rhenia entry can involve jumping or wading, and you might need flotation help like a noodle depending on the stop.

If you’re flexible and want a practical, good-value mix of ruins and sea, this boat trip is exactly the kind of Mykonos day I’d recommend.

Should you book the Delos & Rhenia half-day boat trip?

Book it if you want a single trip that hits two major reasons people come to the Cyclades: ancient ruins at Delos and clear-water swimming at Rhenia, all wrapped into a smooth 6.5-hour format with food onboard.

Skip or reconsider if you’re chasing a quiet, fully guided, museum-only experience, or if you know you’ll struggle with choppy water days. With the right packing and expectations, though, this is one of those Mykonos departures that tends to feel like a highlight rather than just a checkbox.

FAQ

Do I need an entrance ticket for Delos?

Delos entrance is not included in the price, and it’s listed at about €20.

How long is the trip?

The total duration is about 6.5 hours.

Where do I meet the boat?

Meet at the bus station at the Old Port of Mykonos.

Is Delos guided?

Delos is a self-guided visit with about two hours on-site.

Can I choose to swim instead of going onto Delos?

Yes. You can stay on the boat rather than getting off for the Delos visit, and you’ll have time for additional swimming.

Is snorkeling equipment provided?

Snorkeling equipment is not included, but you can purchase it on board.

What should I bring?

Bring a passport or ID card, plus essentials for sun and water comfort like sunscreen and swimwear. Water shoes can help if you have them.

Is the boat ride rough?

Some guests report choppy or bouncy conditions, especially on windy days. If you get sea sick easily, bring meds.

What’s included for food and drinks?

The trip includes BBQ and fruit. Many guests also report wine and soft drinks available onboard.

Is swimming possible at Delos?

No. Delos is for sightseeing and walking the site, while the swimming time is mainly at Rhenia.