Start on Thursday, when all three weekly flyers are easy to compare before the weekend shop. Build one complete list, price the same size and brand where possible, then rank Aldi, Lidl, and Giant by the total you can actually buy nearby.
Build one list before opening a flyer
Use the list you expect to carry home, not a handful of loss leaders. Include staples, produce, proteins, household items, and the specific items that would force a second trip if they were missing.
Write quantities beside each item: two gallons of milk, one dozen eggs, chicken for three dinners, bananas, salad greens, rice, coffee, paper towels. That keeps a “great deal” on a small package from quietly beating a better value on the size you need.
Check the flyers on the same Thursday. Offers can change, app-only prices may have requirements, and some promotions apply only to a stated quantity. Note those conditions beside the price.
Compare like for like
Aldi and Lidl often make the first pass quick on core grocery staples. Giant may carry the exact branded item, a larger selection, or the household item missing from the discount-store basket. The useful comparison is the full basket total after substitutions, not a single item price.
For each list item, record:
- The item, package size, and advertised price.
- Any required loyalty account, coupon, or multi-buy condition.
- Whether the item is an exact match, an acceptable substitute, or unavailable.
- The store where you would realistically buy it.
A 12-ounce bag and a 16-ounce bag belong in separate columns until you calculate the unit price. Produce needs the same attention. One flyer may list a per-pound price while another promotes a prepacked bag.
Keep unavailable items visible. A lower total built around six missing items is not a finished grocery plan. The missing-items check matters most when you are comparing a nearby Giant with a lower-priced Aldi or Lidl that does not stock a specific brand, specialty ingredient, or household essential.
Rank the three one-store totals
Once every item has a store and price, total each complete one-store basket. If a store cannot cover the list, mark it incomplete rather than treating its partial total as the winner.
Your ranking should answer three different questions:
- Which store has the lowest complete basket?
- Which store is closest and complete?
- Which store has the fewest substitutions you are willing to make?
That third question can change the result. If Aldi has the lowest price but requires replacing several planned items with alternatives your household will not use, the apparent savings shrink in practical value. The same applies to Lidl. A Giant basket may cost more, while avoiding a second stop and keeping the brands or sizes you planned around.
Test one two-store route
After ranking the one-store totals, test one split route rather than building an elaborate circuit across the city. Start with the store that wins the most expensive or most flexible parts of the list, then add a second store only for items with a meaningful price gap or clear availability advantage.
A common Thursday check looks like this: Aldi or Lidl handles staples and produce, while Giant fills the branded, specialty, or missing items. Put the split total beside the best single-store total. Then add the route.
Use the actual locations you would visit, not a store address that happens to have the best flyer. Check the map, parking situation, and whether the second stop sits along a route you already drive. A two-store plan that adds a short detour after work has a different cost from one that sends you across Washington, DC on a Saturday morning.
For a closer look at that decision, read [the parking-lot pause when the cheaper second stop is across town]( /blog/the-parking-lot-pause-when-the-cheaper-second-stop-is-across-town-use-the-convenience-versus-savings-tradeoff-to-decide-whether-the-extra-trip-still-makes-sense-c267d348/).
Decide what the extra stop is worth
Put a dollar figure beside the two-store savings, then compare it with the extra distance and time. There is no universal cutoff. A few dollars may justify a second stop when both stores are on your normal route and your list is large. The same amount may not cover an extra round trip, parking, and the chance that the advertised item is gone.
Thursday is useful because it gives you time to make that call before the shopping window gets crowded. It also helps you spot a practical alternative: buy the complete basket at the nearest store this week, then watch the recurring items whose prices tend to shift between flyers.
Make the next check faster
Save the list after you shop. Next Thursday, reuse it and update only the items that changed. Over a few weeks, you will learn which products are worth checking across Aldi, Lidl, and Giant, and which ones are reliably close enough in price to buy at the nearest complete store.
Paste your usual list into Best Price Alert before leaving home, compare one-store and two-store totals using nearby prices, and keep the route that fits both your budget and your afternoon.
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