Last Updated: March 2026 | Sources Verified: Marriott Dining Records, Local Physical Menu Audits, and Independent Delivery Partner Pricing | Author: LatestMenus.com Editorial Team
Important Dining Note: There are two distinct establishments matching this search: (1) Three Flags Grill, an American casual dining spot located inside the Marriott St. Louis Airport, and (2) 3 Flags Grill & Restaurant, an independent regional eatery specializing in Portuguese, Spanish, and American barbecue. This guide covers the menus, pricing, and ordering strategies for both entities to ensure you find exactly what you are looking for.
3 Flags Grill & Restaurant Menu with Prices, Calories and Popular Items
Welcome to the most complete guide for the 3 flags grill & restaurant menu options. Because searchers often look for this name intending to find one of two completely different restaurants, we have structured this guide to help you find exactly what you need.
First, we cover the popular Three Flags Grill menu, an American casual dining restaurant located inside the Marriott St. Louis Airport, known for its hearty hot breakfast buffet and regional St. Louis-style dishes. Second, we detail the menu for the regional, independent 3 Flags Grill & Restaurant, famous for its Portuguese and Spanish-influenced barbecue, savory paella, and wood-fired churrasco chicken.
Whether you are looking for casual dining menus with airport convenience or a robust family-style Iberian feast, this guide covers verified pricing structures, popular signature dishes, calorie availability, dietary workarounds, and smart dining hacks.
Prices, menu options, and portion sizes may vary depending on restaurant location, seasonal ingredient availability, and whether you order in-person or via third-party delivery apps.
Menu Snapshot: Quick Answer
Are you trying to figure out which 3 Flags Grill fits your craving? Here is a quick snapshot comparing the two distinct establishments so you can scan the highlights fast.
Official Source Verification
Official Source Verification
Menus, prices, calories, and availability can vary by location, delivery platform, and time. LatestMenus checks official restaurant sources where available and marks uncertain information clearly.
Latest Three Flags Grill Menu Prices (Marriott St. Louis Airport)
If you are staying at the Marriott St. Louis Airport, you are looking for the Three Flags Grill. It is known for its fast service, robust breakfast buffet, and local flavors. Similar to checking the Northsider Bar and Grille menu for convenient travel dining, this menu balances comfort food with quick, satisfying bites.
Breakfast Menu (6:00 AM – 11:00 AM)
| Menu Item | Category | Price | Calories | Best For | Notes |
|---|---|---|---|---|---|
| Three Flags Signature Breakfast Buffet | Breakfast | $22.00 | Not published | Early travelers, large appetites | Includes made-to-order omelets, bacon, pastries, fruit, and coffee. |
| All-American Two Egg Breakfast | Breakfast | $16.00 | Not published | Classic breakfast fans | GF options available. Eggs cooked to order with meat and potatoes. |
| Classic Eggs Benedict | Breakfast | $17.00 | Not published | Savory breakfast cravings | Poached eggs, Canadian bacon, English muffin, hollandaise. |
| Buttermilk Pancake Stack | Breakfast | $14.50 | Not published | Sweet cravings, vegetarians | Three fluffy pancakes with maple syrup and berries. |
| Steel-Cut Oatmeal | Breakfast | $9.50 | Not published | Budget diners, healthy choice | Served with brown sugar, raisins, and pecans. Vegan option available. |
All-Day Dining (Lunch & Dinner)
| Menu Item | Category | Price | Calories | Best For | Notes |
|---|---|---|---|---|---|
| The Three Flags Classic Burger | Entrées | $18.50 | Not published | Lunch and casual dinner | Half-pound Angus beef with cheddar. GF bun available (+$2.00). |
| St. Louis Style Toasted Ravioli | Appetizers | $12.00 | Not published | Sharing, local flavor | A regional favorite served with marinara. |
| Grilled Ribeye Steak | Entrées | $36.00 | Not published | Hearty dinner, GF diners | 12 oz. center-cut steak with mashed potatoes and asparagus. |
| Pan-Seared Atlantic Salmon | Entrées | $28.00 | Not published | Lighter dining, GF diners | Crispy skin-on salmon with wild rice and lemon-herb butter. |
| Craft Flatbread | Appetizers | $14.00 | Not published | Light lunch, vegetarians | Roasted garlic, mozzarella, heirloom tomatoes, balsamic drizzle. |
| Classic Club Sandwich | Entrées | $17.00 | Not published | Quick lunch | Triple-decker with turkey, ham, bacon, and cheese on sourdough. |
Latest 3 Flags Grill Menu Prices (Portuguese & Spanish BBQ)
If you are looking for the independent, regional 3 Flags Grill & Restaurant, you are likely seeking heavy, flavorful portions of Iberian classics. Because this is an independent eatery, exact prices will vary by location and daily seafood market values. The prices below are estimates based on local delivery data.
| Menu Item | Category | Price | Calories | Best For | Notes |
|---|---|---|---|---|---|
| Shrimp in Garlic Sauce (Camarão à Guilho) | Starters | Varies ($13.50–$15.50) | Not published | Seafood lovers | Sautéed in garlic, olive oil, and white wine. |
| Chouriço Bombeiro | Starters | Varies ($12.50–$14.50) | Not published | Sharing, groups | Traditional Portuguese pork sausage, often flame-grilled tableside. |
| Bife à Casa (House Steak) | Meat | Varies ($24.00–$28.00) | Not published | Big appetites | Pan-seared steak topped with a fried egg and garlic gravy. |
| Churrasco (BBQ Chicken) | Poultry | Varies ($16.50–$21.00) | Not published | Families, protein diets | Wood-fired, available in half or whole portions. |
| Carne de Porco à Alentejana | Meat/Seafood | Varies ($22.00–$25.00) | Not published | Authentic Iberian flavor | Marinated pork and clams stewed with potatoes. |
| Paella Marinera | Seafood | Varies ($29.00–$34.00) | Not published | Special occasions | Saffron rice loaded with lobster, shrimp, mussels, clams, and calamari. |
Popular Menu Items
When evaluating the 3 flags grill & restaurant menu, popularity depends entirely on which establishment you are visiting. Here are the top-ordered items across both brands.
| Popular Item | Why People Order It | Price Note | Calorie Note |
|---|---|---|---|
| Three Flags Classic Burger (Marriott) | Reliable, high-quality airport meal. Juicy custom chuck-and-brisket patty. | $18.50 | Not published |
| St. Louis Style Toasted Ravioli (Marriott) | A vital "bucket-list" item for travelers wanting local flavor without leaving the hotel. | $12.00 | Not published |
| Churrasco BBQ Chicken (Portuguese) | Praised for its smoky, wood-fired skin and bold piri-piri garlic seasoning. | Varies by location | Not published |
| Paella Marinera (Portuguese) | A grand, family-sized presentation packed with saffron and abundant shellfish. | Varies by location | Not published |
Editor Picks: Best Things to Order
These are LatestMenus editorial recommendations based on available menu research, value, popularity, customization potential, and practical ordering usefulness. They are not official restaurant rankings.
Three Flags Signature Breakfast Buffet (Marriott)
This is the most convenient and well-rounded option for hotel guests, offering unlimited access to fresh fruit, hot foods, and a custom omelet station.
Steel-Cut Oatmeal (Marriott)
For under $10, you get a filling, warm, and highly nutritious breakfast that avoids steep airport markups.
Family BBQ Chicken Platters (Portuguese)
Ordering whole chickens with large sides of yellow rice, black beans, and fries easily feeds a group at a fraction of the cost of individual entrées.
Pan-Seared Atlantic Salmon (Marriott)
A high-quality protein choice that avoids heavy frying oils, served with a sensible portion of wild rice and vegetables.
St. Louis Toasted Ravioli (Marriott)
It’s the easiest way to sample Missouri's most famous appetizer without having to book a ride-share to downtown St. Louis.
Paella Marinera (Portuguese)
Independent Iberian grills are often flexible. If you want to swap out a certain shellfish due to preference, they can usually accommodate when building your paella pan.
Cheapest Items and Best Value Picks
Navigating hotel or specialty regional menus on a budget requires strategy. Here are the best ways to get value at both restaurants.
| Value Pick | Why It Can Be Good Value | Watch Out For | Best Ordering Tip |
|---|---|---|---|
| Steel-Cut Oatmeal (Marriott) | At $9.50, it is incredibly filling and stays well below the average airport breakfast price. | Doesn't include the variety of the buffet. | Ask for extra brown sugar and pecans on the side to make it heartier. |
| Craft Flatbread + Caesar Salad (Marriott) | Combining these two ($14.00 + $11.00) serves two people comfortably for an under-$25 lunch. | Adding chicken to the salad will raise the price. | Split this if you have an afternoon flight and want a light meal. |
| Lunch Specials (Portuguese) | Lunch portions of traditional dishes (like pork chops or BBQ chicken) are often deeply discounted on weekdays. | Only available during limited mid-day hours. | Call ahead to confirm lunch special hours before visiting. |
| Family Platter Deals (Portuguese) | Bundling a whole chicken with rice, beans, and fries is significantly cheaper than a la carte ordering. | May not be available on all delivery apps. | Order this via phone for pickup to avoid delivery app upcharges. |
Calories and Nutrition Notes
If you are tracking macros, finding nutrition data can be challenging. Because both the Marriott St. Louis location and the independent 3 Flags Grill operate as single entities rather than massive corporate chains, they are legally exempt from FDA national menu labeling laws.
| Menu Area | Nutrition Note | Best For | Source Confidence |
|---|---|---|---|
| Marriott Entrées | Opt for the Atlantic Salmon or Grilled Ribeye. Swap heavy starches for extra asparagus or a garden salad. | Low-carb or protein-focused diners. | Low (Calories not published officially) |
| Marriott Breakfast | The buffet's omelet station allows you to request egg-white omelets packed with spinach, tomatoes, and mushrooms. | Healthy breakfast seekers. | Low (Calories not published officially) |
| Portuguese Grill (Churrasco) | Wood-fired rotisserie meats are naturally very high in protein. Avoid fried items like Calamari to cut down on saturated fats. | Keto or high-protein diets. | Low (Calories not published officially) |
Allergen and Dietary Notes
Dining safely with food allergies requires clear communication, especially when official allergen matrices are not published online. Whether you are ordering a burger or exploring drinks menus at local grills, always speak to a manager.
| Dietary Need | What to Check | Important Note |
|---|---|---|
| Shellfish Allergies | The entire menu at the Portuguese location. | The Portuguese/Spanish grill uses massive quantities of shrimp, clams, and lobsters. Cross-contact in fryers and pans is highly likely. |
| Gluten-Free Dining | Buns and sauces. | The Marriott location offers GF buns for a small upcharge. At the Portuguese spot, beware of green and red sauces that may use wheat flour as a thickener. |
| Vegetarian Choices | Broths and beans. | The Marriott has easy options (oatmeal, flatbreads, pancakes). The Portuguese menu is heavily meat-based; verify if black beans are cooked with pork or lard. |
Special Menu Sections
Breakfast Menu (Marriott Location)
The breakfast hours at the Three Flags Grill are heavily geared toward early flyers. The buffet ($22.00) opens at 6:00 AM.
| Item or Section | What It Includes | Price/Calorie Note | Best For |
|---|---|---|---|
| Made-to-Order Omelet Station | Custom eggs with veggies, meats, and cheeses. | Included in the $22.00 buffet price. | Customized, hot breakfasts. |
Drinks and Desserts (Portuguese Location)
Iberian grills are famous for traditional desserts.
| Item or Section | What It Includes | Price/Calorie Note | Best For |
|---|---|---|---|
| Pudim (Caramel Flan) | Silky Portuguese baked custard in dark caramel. | Estimated $6.50; Calories not published. | A traditional sweet finish. |
Best For: Who This Menu Guide Helps
This breakdown is specifically designed to help:
- Business Travelers: Finding the fastest, most reliable hot breakfast before a St. Louis flight.
- Families: Identifying the most cost-effective sharing platters at regional barbecue grills.
- Locals: Seeking verified pricing for favorite dishes without relying on outdated photo uploads.
- People with Allergies: Understanding the high risks of shellfish cross-contamination at Iberian restaurants.
- Budget-Conscious Diners: Avoiding third-party delivery markups by learning when and how to order direct.
Ordering Tips From LatestMenus
To ensure you have the best possible experience at either 3 Flags Grill location, follow these expert dining strategies.
- Check the official app or local restaurant for exact prices. Menu prices can vary by city, restaurant, and delivery platform.
- Look for Marriott Bonvoy Perks. If staying at the Marriott, check if your elite status includes complimentary access to the Three Flags breakfast buffet.
- Beat the flight rush. The Marriott breakfast rush peaks between 7:30 AM and 8:45 AM. Dine before 7:00 AM for the fastest table service.
- Watch for delivery markups. Third-party delivery apps will often mark up independent restaurant prices (like the Portuguese 3 Flags Grill) by 15% to 25%. Order direct by calling the restaurant for pickup.
- Compare combos with à la carte items. For independent grills, family meals with rice and beans are vastly cheaper per person than ordering individual steak or chicken plates.
- Use official nutrition and allergen pages before ordering. Since neither location provides extensive online nutrition data, always ask your server about gluten and shellfish cross-contamination before ordering.
Frequently Asked Questions
What are the operating hours for Three Flags Grill at the Marriott St. Louis Airport?
The restaurant is generally open daily from 6:00 AM to 11:00 PM. Breakfast is served from 6:00 AM to 11:00 AM, followed by the all-day lunch and dinner menu.
Can locals dine at the Marriott Three Flags Grill, or is it only for hotel guests?
The restaurant is fully open to the general public. It is a highly popular meeting spot for local business professionals and airport staff.
Does the St. Louis Airport location offer room service?
Yes. Guests staying at the Marriott St. Louis Airport can order from the Three Flags Grill menu for delivery directly to their rooms, subject to standard room service fees.
What is included in the Three Flags Signature Breakfast Buffet?
The $22.00 buffet features made-to-order omelets, scrambled eggs, bacon, sausage, breakfast potatoes, fresh pastries, seasonal fruits, juices, and unlimited coffee.
What are the best Portuguese specialties at the independent 3 Flags Grill?
The highly recommended specialties are the Churrasco (wood-fired BBQ Chicken), Paella Marinera, and the Chouriço Bombeiro (flame-grilled tableside sausage).
Does 3 Flags Grill have a menu with prices online?
Because neither the Marriott location nor the independent Portuguese brand maintains an exhaustive, updated digital price list with calorie counts, exact pricing will vary based on whether you dine in or use a delivery app.
Are there gluten-free buns available at Three Flags Grill?
Yes, the Marriott location offers gluten-free buns for their classic burgers and grilled sandwiches upon request, typically for a small upcharge.
Why do prices online look higher than the physical menu at 3 Flags Grill?
Third-party delivery apps like DoorDash, Grubhub, and Uber Eats add a markup to base menu prices to offset their platform commission fees. Ordering directly from the restaurant secures the lowest price.
Does the Portuguese 3 Flags Grill offer lunch specials?
Yes. Most independent Iberian locations offer highly affordable lunch specials during weekdays (usually 11:00 AM to 3:00 PM), featuring smaller portions bundled with rice and beans.
Where can I find calories for these menus?
Since both establishments operate independently from national fast-food chains, they are exempt from federal menu labeling laws and do not publish official calorie counts.
Conclusion
Understanding the difference between the Three Flags Grill at the St. Louis Airport Marriott and the independent 3 Flags Grill & Restaurant ensures you get exactly the meal you expect. Whether you need a fast, reliable airport breakfast buffet with a toasted ravioli lunch, or an authentic family-style feast of churrasco chicken and paella, both brands offer robust flavors and satisfying portions. Use the smart ordering tips and value guides featured here to maximize your dining budget.
Menus, prices, calories, and availability can change by location, time, delivery platform, and restaurant updates. Always confirm the latest information with the official restaurant website, app, or your local restaurant before ordering. Information verified for 2026 where available.
