Start at Le Jardin du Luxembourg for a peaceful stroll among statues and winter beds; grab a coffee and a pastry from Carette (6 Rue de Vaugirard) and enjoy it on a park bench.
Walk to Rue de Fleurus briefly to glimpse the Saint-Sulpice area, then head to Odéon metro station (Line 4) to travel toward the Louvre.
Arrive at the Louvre Museum; enter via the Pyramide entrance if you have prebooked tickets and start with the Denon wing to see the Mona Lisa and Italian masters.
Finish your Louvre highlights and walk through the Cour Carrée toward Palais Royal; stop for a quick hot chocolate or espresso at Café Kitsuné in the gardens.
Take the metro from Palais Royal - Musée du Louvre (Line 1) to Charles de Gaulle-Étoile (Line 1 direct) to visit the Arc de Triomphe and climb for panoramic views of the Champs-Élysées.
After the Arc, stroll down the Champs-Élysées for a short cafe stop at Ladurée or Le Fouquet's before making your way toward the Eiffel Tower area by metro (Line 6 from Charles de Gaulle-Étoile to Bir-Hakeim).
Take the metro from Bir-Hakeim (Line 6) toward Trocadéro for classic Eiffel Tower photos from the esplanade; linger at Place du Trocadéro to enjoy the view and street musicians.
Walk down toward the Eiffel Tower esplanade and, if you wish, purchase summit or second-floor tickets in advance; otherwise enjoy a picnic-style lunch nearby from Le Champ de Mars - food stalls or a sandwich from Boulangerie Bo.
From the Eiffel area, take Metro Line 6 at Bir-Hakeim to Montparnasse Bienvenue (change at Pasteur if needed) and then Line 4 to Saint-Sulpice / Odéon to head toward Rue Crémieux via a short transfer (Line 4 to Line 8 at Strasbourg - Saint-Denis, then Line 5/3 as convenient) — enjoy people-watching on the ride.
Arrive at Rue Crémieux and stroll this colorful pedestrian street, taking photos of the painted facades and stopping for a warming coffee at Café du Coin or a hot chocolate from a nearby boulangerie.
From Rue Crémieux, take Metro Line 5 from Gare d'Austerlitz (short walk) toward Saint-Michel (change may be required depending on exact location) and head back toward the Seine to enjoy a riverside walk toward the Île de la Cité.
Pause for a late-afternoon pastry and people-watching at Carette on Place du Trocadéro if you prefer returning that way, or try Le Procope in Saint-Germain for a historic café atmosphere.
If time allows, take Metro Line 1 at Châtelet (or nearby station depending on your position) toward Palais Royal - Musée du Louvre for a relaxed return toward the central area and to pick up any souvenirs from Rue de Rivoli shops.
Enjoy a final sit-down drink at Café Marly overlooking the Louvre courtyard or a cozy vin chaud at a nearby café while watching Parisian evening light settle in.
Make your way to your final departure point by metro — from Palais Royal - Musée du Louvre take Line 1 or other required lines depending on your exit — allowing time to reach your 6:00 PM departure comfortably.
From Palais Royal - Musée du Louvre, stroll toward Place Vendôme for elegant window-shopping and stop for a cocktail or hot chocolate at Hôtel Ritz Paris - Bar Vendôme while enjoying the early evening glow.
Take Metro Line 1 at Tuileries or Palais Royal - Musée du Louvre to Châtelet, then transfer to Line 4 to reach Saint-Germain-des-Prés for a classic Parisian dinner vibe at Café de Flore or Les Deux Magots.
After dinner, wander the charming streets of Saint-Germain-des-Prés, ducking into Shakespeare and Company for a quick browse, then walk to Pont Neuf for a riverside view of illuminated bridges and the Seine.
Head to Trocadéro by Metro Line 6 from Rennes (or Line 9 from Saint-Augustin depending on your position) to admire the Eiffel Tower sparkling on the hour; enjoy the show from Esplanade du Trocadéro with photos and warm drinks from nearby vendors.
Descend toward Champ de Mars for a closer evening view of the illuminated Eiffel Tower, and if you prefer a late dessert, stop at Carette on Place du Trocadéro for pastries or a chocolat chaud.
Return toward your departure point by taking Metro Line 6 from Bir-Hakeim or Line 9 from Trocadéro, allowing time to collect luggage or reach your train/airport transfer; enjoy a final walk along the Seine if time permits.